This document provides an overview and summary of the Oracle Database SQL Reference manual. It includes information about the primary author and contributors, copyright details, and instructions that the document and programs are proprietary and protected. It also contains a table of contents listing the chapters and main topics covered in the manual such as datatypes, literals, format models, nulls, comments and hints.
3. iii
Contents
Preface............................................................................................................................................................... xxi
Intended Audience.................................................................................................................................... xxi
Documentation Accessibility................................................................................................................... xxi
Related Documents .................................................................................................................................. xxii
Conventions .............................................................................................................................................. xxii
What's New in the SQL Reference?............................................................................................... xxiii
Oracle Database 10g Release 2 New Features in the SQL Reference............................................... xxiii
Oracle Database 10g Release 1 New Features in the SQL Reference............................................... xxv
1 Introduction to Oracle SQL
History of SQL ......................................................................................................................................... 1-1
SQL Standards ......................................................................................................................................... 1-1
How SQL Works ............................................................................................................................... 1-2
Common Language for All Relational Databases ......................................................................... 1-3
Recent Enhancements.............................................................................................................................. 1-3
Lexical Conventions................................................................................................................................. 1-3
Tools Support ........................................................................................................................................... 1-4
2 Basic Elements of Oracle SQL
Datatypes .................................................................................................................................................. 2-1
Oracle Built-in Datatypes.................................................................................................................. 2-6
CHAR Datatype ......................................................................................................................... 2-8
NCHAR Datatype ...................................................................................................................... 2-9
NVARCHAR2 Datatype ........................................................................................................... 2-9
VARCHAR2 Datatype ............................................................................................................... 2-9
VARCHAR Datatype .............................................................................................................. 2-10
NUMBER Datatype ................................................................................................................ 2-10
Floating-Point Numbers ........................................................................................................ 2-11
BINARY_FLOAT .............................................................................................................. 2-12
BINARY_DOUBLE........................................................................................................... 2-12
Numeric Precedence ............................................................................................................... 2-13
DATE Datatype ....................................................................................................................... 2-16
Using Julian Days ............................................................................................................. 2-16
TIMESTAMP Datatype .......................................................................................................... 2-17
4. iv
TIMESTAMP WITH TIME ZONE Datatype ....................................................................... 2-17
TIMESTAMP WITH LOCAL TIME ZONE Datatype ........................................................ 2-18
INTERVAL YEAR TO MONTH Datatype .......................................................................... 2-18
INTERVAL DAY TO SECOND Datatype ........................................................................... 2-19
Datetime/Interval Arithmetic ............................................................................................... 2-19
Support for Daylight Saving Times ...................................................................................... 2-21
Datetime and Interval Examples ........................................................................................... 2-22
RAW and LONG RAW Datatypes ....................................................................................... 2-23
BFILE Datatype ....................................................................................................................... 2-26
BLOB Datatype ........................................................................................................................ 2-26
CLOB Datatype ....................................................................................................................... 2-27
NCLOB Datatype .................................................................................................................... 2-27
Restricted Rowids ................................................................................................................... 2-27
Extended Rowids .................................................................................................................... 2-28
Compatibility and Migration ................................................................................................ 2-28
UROWID Datatype ................................................................................................................. 2-28
ANSI, DB2, and SQL/DS Datatypes ........................................................................................... 2-29
User-Defined Types ....................................................................................................................... 2-30
Object Types ............................................................................................................................ 2-30
REF Datatypes ......................................................................................................................... 2-31
Varrays ...................................................................................................................................... 2-31
Nested Tables .......................................................................................................................... 2-31
Oracle-Supplied Types .................................................................................................................. 2-32
Any Types ....................................................................................................................................... 2-32
ANYTYPE ................................................................................................................................. 2-32
ANYDATA................................................................................................................................ 2-32
ANYDATASET......................................................................................................................... 2-32
XML Types ...................................................................................................................................... 2-33
XMLType .................................................................................................................................. 2-33
URI Datatypes ......................................................................................................................... 2-33
URIFactory Package ................................................................................................................ 2-34
Spatial Types ................................................................................................................................... 2-34
SDO_GEOMETRY ................................................................................................................... 2-35
SDO_TOPO_GEOMETRY ..................................................................................................... 2-35
SDO_GEORASTER.................................................................................................................. 2-35
Media Types .................................................................................................................................... 2-35
ORDAudio ............................................................................................................................... 2-36
ORDImage ................................................................................................................................ 2-36
ORDImageSignature ............................................................................................................... 2-36
ORDVideo ................................................................................................................................ 2-36
ORDDoc .................................................................................................................................... 2-36
SI_StillImage ............................................................................................................................ 2-36
SI_Color .................................................................................................................................... 2-36
SI_AverageColor ..................................................................................................................... 2-36
SI_ColorHistogram ................................................................................................................. 2-36
SI_PositionalColor .................................................................................................................. 2-36
SI_Texture ................................................................................................................................ 2-36
5. v
SI_FeatureList .......................................................................................................................... 2-37
Expression Filter Type.................................................................................................................... 2-37
Expression................................................................................................................................. 2-37
Datatype Comparison Rules .............................................................................................................. 2-37
Numeric Values .............................................................................................................................. 2-37
Date Values ..................................................................................................................................... 2-37
Character Values ............................................................................................................................ 2-37
Object Values .................................................................................................................................. 2-40
Varrays and Nested Tables ........................................................................................................... 2-40
Data Conversion ............................................................................................................................. 2-40
Implicit and Explicit Data Conversion ................................................................................ 2-40
Implicit Data Conversion ....................................................................................................... 2-41
Implicit Data Conversion Examples...................................................................................... 2-43
Explicit Data Conversion ....................................................................................................... 2-43
Literals .................................................................................................................................................... 2-44
Text Literals ..................................................................................................................................... 2-45
Numeric Literals ............................................................................................................................. 2-46
Integer Literals ......................................................................................................................... 2-46
NUMBER and Floating-Point Literals .................................................................................. 2-47
Datetime Literals ............................................................................................................................ 2-49
Interval Literals................................................................................................................................ 2-51
INTERVAL YEAR TO MONTH ............................................................................................ 2-52
INTERVAL DAY TO SECOND ............................................................................................. 2-53
Format Models ...................................................................................................................................... 2-54
Number Format Models ................................................................................................................ 2-55
Number Format Elements ..................................................................................................... 2-56
Datetime Format Models .............................................................................................................. 2-58
Datetime Format Elements .................................................................................................... 2-59
Uppercase Letters in Date Format Elements ............................................................... 2-59
Punctuation and Character Literals in Datetime Format Models ............................. 2-59
Datetime Format Elements and Globalization Support .................................................... 2-62
ISO Standard Date Format Elements ................................................................................... 2-62
The RR Datetime Format Element ........................................................................................ 2-63
RR Datetime Format Examples....................................................................................... 2-63
Datetime Format Element Suffixes ....................................................................................... 2-64
Format Model Modifiers ............................................................................................................... 2-64
Format Model Examples......................................................................................................... 2-65
String-to-Date Conversion Rules ................................................................................................. 2-67
XML Format Model ....................................................................................................................... 2-67
Nulls ........................................................................................................................................................ 2-68
Nulls in SQL Functions ................................................................................................................. 2-69
Nulls with Comparison Conditions ............................................................................................ 2-69
Nulls in Conditions ........................................................................................................................ 2-69
Comments .............................................................................................................................................. 2-70
Comments Within SQL Statements ............................................................................................. 2-70
Comments on Schema Objects ..................................................................................................... 2-71
Using Hints ..................................................................................................................................... 2-71
6. vi
Alphabetical Listing of Hints ........................................................................................................ 2-75
ALL_ROWS Hint .................................................................................................................... 2-75
APPEND Hint .......................................................................................................................... 2-75
CACHE Hint ............................................................................................................................ 2-76
CLUSTER Hint ........................................................................................................................ 2-76
CURSOR_SHARING_EXACT Hint ..................................................................................... 2-76
DRIVING_SITE Hint .............................................................................................................. 2-77
DYNAMIC_SAMPLING Hint ............................................................................................... 2-77
FACT Hint ................................................................................................................................ 2-78
FIRST_ROWS Hint .................................................................................................................. 2-78
FULL Hint ................................................................................................................................ 2-78
HASH Hint .............................................................................................................................. 2-79
INDEX Hint ............................................................................................................................. 2-79
INDEX_ASC Hint ................................................................................................................... 2-80
INDEX_COMBINE Hint ....................................................................................................... 2-80
INDEX_DESC Hint ................................................................................................................. 2-80
INDEX_FFS Hint ..................................................................................................................... 2-81
INDEX_JOIN Hint .................................................................................................................. 2-81
INDEX_SS Hint ....................................................................................................................... 2-81
INDEX_SS_ASC Hint ............................................................................................................. 2-82
INDEX_SS_DESC Hint ........................................................................................................... 2-82
LEADING Hint ........................................................................................................................ 2-83
MERGE Hint ............................................................................................................................ 2-83
MODEL_MIN_ANALYSIS Hint ........................................................................................... 2-83
NOAPPEND Hint ................................................................................................................... 2-84
NOCACHE Hint ..................................................................................................................... 2-84
NO_EXPAND Hint ................................................................................................................. 2-84
NO_FACT Hint ....................................................................................................................... 2-85
NO_INDEX Hint ..................................................................................................................... 2-85
NO_INDEX_FFS Hint ............................................................................................................ 2-85
NO_INDEX_SS Hint ............................................................................................................... 2-86
NO_MERGE Hint ................................................................................................................... 2-86
NO_PARALLEL Hint ............................................................................................................. 2-86
NOPARALLEL Hint................................................................................................................ 2-87
NO_PARALLEL_INDEX Hint .............................................................................................. 2-87
NOPARALLEL_INDEX Hint................................................................................................. 2-87
NO_PUSH_PRED Hint .......................................................................................................... 2-87
NO_PUSH_SUBQ Hint .......................................................................................................... 2-87
NO_PX_JOIN_FILTER Hint .................................................................................................. 2-88
NO_REWRITE Hint ................................................................................................................ 2-88
NOREWRITE Hint................................................................................................................... 2-88
NO_QUERY_TRANSFORMATION Hint ........................................................................... 2-88
NO_STAR_TRANSFORMATION Hint ............................................................................... 2-88
NO_UNNEST Hint ................................................................................................................. 2-88
NO_USE_HASH Hint ............................................................................................................ 2-89
NO_USE_MERGE Hint .......................................................................................................... 2-89
NO_USE_NL Hint .................................................................................................................. 2-89
7. vii
NO_XML_QUERY_REWRITE Hint...................................................................................... 2-89
ORDERED Hint ....................................................................................................................... 2-90
PARALLEL Hint ..................................................................................................................... 2-90
PARALLEL_INDEX Hint ...................................................................................................... 2-91
PQ_DISTRIBUTE Hint ........................................................................................................... 2-91
PUSH_PRED Hint ................................................................................................................... 2-92
PUSH_SUBQ Hint ................................................................................................................... 2-93
PX_JOIN_FILTER Hint ........................................................................................................... 2-93
QB_NAME Hint ...................................................................................................................... 2-93
REWRITE Hint ........................................................................................................................ 2-94
RULE Hint ................................................................................................................................ 2-94
STAR_TRANSFORMATION Hint ....................................................................................... 2-94
UNNEST Hint .......................................................................................................................... 2-95
USE_CONCAT Hint ............................................................................................................... 2-95
USE_HASH Hint ..................................................................................................................... 2-96
USE_MERGE Hint .................................................................................................................. 2-96
USE_NL Hint ........................................................................................................................... 2-96
USE_NL_WITH_INDEX Hint ............................................................................................... 2-97
Database Objects................................................................................................................................... 2-97
Schema Objects ............................................................................................................................... 2-97
Nonschema Objects ........................................................................................................................ 2-98
Schema Object Names and Qualifiers ............................................................................................. 2-98
Schema Object Naming Rules ...................................................................................................... 2-98
Schema Object Naming Examples ............................................................................................. 2-101
Schema Object Naming Guidelines ........................................................................................... 2-102
Syntax for Schema Objects and Parts in SQL Statements........................................................... 2-102
How Oracle Database Resolves Schema Object References ................................................... 2-103
Referring to Objects in Other Schemas ..................................................................................... 2-104
Referring to Objects in Remote Databases ................................................................................ 2-104
Creating Database Links ...................................................................................................... 2-104
Database Link Names .................................................................................................... 2-104
Username and Password............................................................................................... 2-105
Database Connect String................................................................................................ 2-105
Referring to Database Links ................................................................................................ 2-105
Referring to Partitioned Tables and Indexes ............................................................................ 2-106
Referring to Object Type Attributes and Methods................................................................... 2-107
3 Pseudocolumns
Hierarchical Query Pseudocolumns .................................................................................................... 3-1
CONNECT_BY_ISCYCLE Pseudocolumn .................................................................................... 3-1
CONNECT_BY_ISLEAF Pseudocolumn ....................................................................................... 3-2
LEVEL Pseudocolumn ...................................................................................................................... 3-2
Sequence Pseudocolumns ..................................................................................................................... 3-3
Where to Use Sequence Values ....................................................................................................... 3-3
How to Use Sequence Values .......................................................................................................... 3-4
Version Query Pseudocolumns ............................................................................................................ 3-5
COLUMN_VALUE Pseudocolumn ...................................................................................................... 3-6
14. xiv
Name Precedence ......................................................................................................................... 5-237
Naming Conventions ........................................................................................................... 5-238
6 Expressions
About SQL Expressions ......................................................................................................................... 6-1
Simple Expressions ................................................................................................................................. 6-3
Compound Expressions ......................................................................................................................... 6-4
CASE Expressions ................................................................................................................................... 6-5
CURSOR Expressions.............................................................................................................................. 6-6
Datetime Expressions ............................................................................................................................. 6-8
Function Expressions .............................................................................................................................. 6-9
Interval Expressions ............................................................................................................................. 6-10
Object Access Expressions .................................................................................................................. 6-10
Scalar Subquery Expressions ............................................................................................................. 6-11
Model Expressions ................................................................................................................................ 6-11
Type Constructor Expressions ............................................................................................................ 6-13
Variable Expressions ............................................................................................................................ 6-15
Expression Lists .................................................................................................................................... 6-15
7 Conditions
About SQL Conditions............................................................................................................................ 7-1
Condition Precedence........................................................................................................................ 7-3
Comparison Conditions ......................................................................................................................... 7-4
Simple Comparison Conditions ...................................................................................................... 7-5
Group Comparison Conditions ....................................................................................................... 7-6
Floating-Point Conditions ..................................................................................................................... 7-7
Logical Conditions ................................................................................................................................... 7-7
Model Conditions ................................................................................................................................... 7-9
IS ANY Condition ............................................................................................................................. 7-9
IS PRESENT Condition ................................................................................................................. 7-10
Multiset Conditions ............................................................................................................................. 7-11
IS A SET Condition ........................................................................................................................ 7-11
IS EMPTY Condition ...................................................................................................................... 7-11
MEMBER Condition ...................................................................................................................... 7-12
SUBMULTISET Condition ............................................................................................................ 7-13
Pattern-matching Conditions ............................................................................................................. 7-14
LIKE Condition ............................................................................................................................... 7-14
REGEXP_LIKE Condition ............................................................................................................. 7-17
Range Conditions ................................................................................................................................. 7-18
Null Conditions .................................................................................................................................... 7-19
XML Conditions ................................................................................................................................... 7-19
EQUALS_PATH Condition .......................................................................................................... 7-19
UNDER_PATH Condition ............................................................................................................ 7-20
Compound Conditions ........................................................................................................................ 7-21
EXISTS Condition ................................................................................................................................ 7-21
IN Condition ........................................................................................................................................ 7-21
IS OF type Condition ........................................................................................................................... 7-23
15. xv
8 Common SQL DDL Clauses
allocate_extent_clause ............................................................................................................................ 8-2
constraint .................................................................................................................................................. 8-4
deallocate_unused_clause .................................................................................................................... 8-26
file_specification ................................................................................................................................... 8-28
logging_clause ........................................................................................................................................ 8-36
parallel_clause ....................................................................................................................................... 8-39
physical_attributes_clause .................................................................................................................. 8-42
size_clause ............................................................................................................................................. 8-45
storage_clause ........................................................................................................................................ 8-46
9 SQL Queries and Subqueries
About Queries and Subqueries ............................................................................................................ 9-1
Creating Simple Queries ........................................................................................................................ 9-2
Hierarchical Queries ............................................................................................................................... 9-2
Hierarchical Query Examples .......................................................................................................... 9-5
The UNION [ALL], INTERSECT, MINUS Operators....................................................................... 9-7
Sorting Query Results ............................................................................................................................ 9-9
Joins ......................................................................................................................................................... 9-10
Join Conditions ............................................................................................................................... 9-10
Equijoins .......................................................................................................................................... 9-10
Self Joins .......................................................................................................................................... 9-11
Cartesian Products ......................................................................................................................... 9-11
Inner Joins ....................................................................................................................................... 9-11
Outer Joins ....................................................................................................................................... 9-11
Antijoins .......................................................................................................................................... 9-13
Semijoins .......................................................................................................................................... 9-13
Using Subqueries ................................................................................................................................. 9-13
Unnesting of Nested Subqueries ...................................................................................................... 9-14
Selecting from the DUAL Table ........................................................................................................ 9-15
Distributed Queries ............................................................................................................................. 9-15
10 SQL Statements: ALTER CLUSTER to ALTER JAVA
Types of SQL Statements .................................................................................................................... 10-1
Data Definition Language (DDL) Statements ............................................................................ 10-1
Data Manipulation Language (DML) Statements ..................................................................... 10-2
Transaction Control Statements ................................................................................................... 10-3
Session Control Statements ........................................................................................................... 10-3
System Control Statement ............................................................................................................. 10-3
Embedded SQL Statements .......................................................................................................... 10-3
How the SQL Statement Chapters are Organized ......................................................................... 10-3
ALTER CLUSTER ................................................................................................................................. 10-5
ALTER DATABASE ............................................................................................................................. 10-9
ALTER DIMENSION ........................................................................................................................ 10-45
ALTER DISKGROUP ........................................................................................................................ 10-48
ALTER FUNCTION ........................................................................................................................... 10-61
16. xvi
ALTER INDEX .................................................................................................................................... 10-64
ALTER INDEXTYPE .......................................................................................................................... 10-82
ALTER JAVA ........................................................................................................................................ 10-84
11 SQL Statements: ALTER MATERIALIZED VIEW to ALTER SYSTEM
ALTER MATERIALIZED VIEW ........................................................................................................ 11-2
ALTER MATERIALIZED VIEW LOG ............................................................................................ 11-15
ALTER OPERATOR ........................................................................................................................... 11-21
ALTER OUTLINE ............................................................................................................................... 11-24
ALTER PACKAGE ............................................................................................................................. 11-26
ALTER PROCEDURE ........................................................................................................................ 11-29
ALTER PROFILE ................................................................................................................................ 11-32
ALTER RESOURCE COST ............................................................................................................... 11-35
ALTER ROLE ....................................................................................................................................... 11-38
ALTER ROLLBACK SEGMENT ..................................................................................................... 11-40
ALTER SEQUENCE ........................................................................................................................... 11-43
ALTER SESSION ................................................................................................................................ 11-45
Initialization Parameters and ALTER SESSION....................................................................... 11-50
Session Parameters and ALTER SESSION ............................................................................... 11-53
ALTER SYSTEM ................................................................................................................................. 11-60
Initialization Parameters and ALTER SYSTEM........................................................................ 11-72
System Parameters and ALTER SYSTEM.................................................................................. 11-83
Shared Server Parameters .................................................................................................... 11-83
12 SQL Statements: ALTER TABLE to ALTER TABLESPACE
ALTER TABLE ....................................................................................................................................... 12-2
ALTER TABLESPACE ........................................................................................................................ 12-79
13 SQL Statements: ALTER TRIGGER to COMMIT
ALTER TRIGGER ................................................................................................................................. 13-2
ALTER TYPE ......................................................................................................................................... 13-5
ALTER USER ....................................................................................................................................... 13-18
ALTER VIEW ....................................................................................................................................... 13-25
ANALYZE ............................................................................................................................................ 13-27
ASSOCIATE STATISTICS ................................................................................................................ 13-38
AUDIT .................................................................................................................................................. 13-42
CALL ..................................................................................................................................................... 13-53
COMMENT ......................................................................................................................................... 13-57
COMMIT ............................................................................................................................................. 13-59
14 SQL Statements: CREATE CLUSTER to CREATE JAVA
CREATE CLUSTER .............................................................................................................................. 14-2
CREATE CONTEXT ............................................................................................................................. 14-9
CREATE CONTROLFILE ................................................................................................................. 14-12
CREATE DATABASE ......................................................................................................................... 14-18
CREATE DATABASE LINK ............................................................................................................. 14-31
17. xvii
CREATE DIMENSION ..................................................................................................................... 14-36
CREATE DIRECTORY ...................................................................................................................... 14-42
CREATE DISKGROUP ..................................................................................................................... 14-44
CREATE FUNCTION ........................................................................................................................ 14-48
CREATE INDEX ................................................................................................................................. 14-58
CREATE INDEXTYPE ....................................................................................................................... 14-81
CREATE JAVA ..................................................................................................................................... 14-84
15 SQL Statements: CREATE LIBRARY to CREATE SPFILE
CREATE LIBRARY ............................................................................................................................... 15-2
CREATE MATERIALIZED VIEW ..................................................................................................... 15-4
CREATE MATERIALIZED VIEW LOG ......................................................................................... 15-25
CREATE OPERATOR ........................................................................................................................ 15-32
CREATE OUTLINE ............................................................................................................................ 15-35
CREATE PACKAGE ........................................................................................................................... 15-39
CREATE PACKAGE BODY .............................................................................................................. 15-43
CREATE PFILE .................................................................................................................................... 15-47
CREATE PROCEDURE ..................................................................................................................... 15-49
CREATE PROFILE ............................................................................................................................. 15-54
CREATE RESTORE POINT ............................................................................................................. 15-60
CREATE ROLE .................................................................................................................................... 15-63
CREATE ROLLBACK SEGMENT .................................................................................................. 15-66
CREATE SCHEMA ............................................................................................................................. 15-69
CREATE SEQUENCE ........................................................................................................................ 15-71
CREATE SPFILE ................................................................................................................................. 15-75
16 SQL Statements: CREATE SYNONYM to CREATE TRIGGER
CREATE SYNONYM ........................................................................................................................... 16-2
CREATE TABLE .................................................................................................................................... 16-6
CREATE TABLESPACE ..................................................................................................................... 16-61
CREATE TRIGGER ............................................................................................................................ 16-75
17 SQL Statements: CREATE TYPE to DROP ROLLBACK SEGMENT
CREATE TYPE ....................................................................................................................................... 17-3
CREATE TYPE BODY ........................................................................................................................ 17-21
CREATE USER .................................................................................................................................... 17-26
CREATE VIEW .................................................................................................................................... 17-32
DELETE ................................................................................................................................................ 17-43
DISASSOCIATE STATISTICS ........................................................................................................ 17-51
DROP CLUSTER ................................................................................................................................ 17-53
DROP CONTEXT ............................................................................................................................... 17-55
DROP DATABASE ............................................................................................................................. 17-56
DROP DATABASE LINK ................................................................................................................. 17-57
DROP DIMENSION .......................................................................................................................... 17-58
DROP DIRECTORY .......................................................................................................................... 17-59
DROP DISKGROUP ......................................................................................................................... 17-60