This tutorial will give you a quick start to SQL including examples. It covers most of the topics required for a basic understanding of SQL and to get a feel of how it works.
The DBMS provides a set of operations or a language called the data manipulation language (DML) for modification of the data.
Data manipulation can be performed either by typing SQL statements or by using a graphical interface, typically called Query-By-Example (QBE).
Data Manipulation(DML) and Transaction Control (TCL) MuhammadWaheed44
A short course "SQL Fundamentals - Oracle 11g" is being in progress at PMAS Arid Agriculture University. Complete course video and can be found at following link
https://www.youtube.com/playlist?list=PL12t8CWUhXZaUXsmg7M67o_Q37JhhfAKU
SQL stands for Structured Query Language.
SQL is a database management language for relational databases.
SQL lets you access and manipulate databases.
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This tutorial will give you a quick start to SQL including examples. It covers most of the topics required for a basic understanding of SQL and to get a feel of how it works.
The DBMS provides a set of operations or a language called the data manipulation language (DML) for modification of the data.
Data manipulation can be performed either by typing SQL statements or by using a graphical interface, typically called Query-By-Example (QBE).
Data Manipulation(DML) and Transaction Control (TCL) MuhammadWaheed44
A short course "SQL Fundamentals - Oracle 11g" is being in progress at PMAS Arid Agriculture University. Complete course video and can be found at following link
https://www.youtube.com/playlist?list=PL12t8CWUhXZaUXsmg7M67o_Q37JhhfAKU
SQL stands for Structured Query Language.
SQL is a database management language for relational databases.
SQL lets you access and manipulate databases.
OMICS Publishing Group journal, Biomolecular Research & Therapeutics is an international, peer-reviewed Open Access journal focusing on biogenic substances, their uses in diagnosing and treatment of diseases, reversing the aging process, and improving overall well-being. Journal of Biomolecular Research & Therapeutics publishes reviews, regular research papers and short communications.
OMICS Publishing Group handles open access journals in the scientific domain. The contents of the journal are reviewed by members of the editorial board. Several members of the board are given credits by OMICS Publishing Group based on peer-review of the manuscripts. The manuscripts by authors are published with the submission date right after acceptance for the respective journal. The OMICS Publishing Group follows the norms of the Bethesda Statement.
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Its about a sql topic for basic structured query languageIMsKanchanaI
this is containning about structured query language and database concepts , commands, queries and queries to create and database and inserting values and rows. rows cannot be inserted at a time. only one row can be inserted at a time.
Data Definition Language (DDL), Data Definition Language (DDL), Data Manipulation Language (DML) , Transaction Control Language (TCL) , Data Control Language (DCL) - , SQL Constraints
An tutorial for sql learners in very easy way. It contains all the sql commands like ddl, dml, etc. with suitable examples.
at the end there are 3 sets of question with their solution with explanation. each set contains 40+ questions.
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Sql select statement
1. 8/10/13 SQL SELECT Statement
beginner-sql-tutorial.com/sql-select-statement.htm 1/3
SQL SELECT Statement
The most commonly used SQL command is SELECT statement. The SQL SELECT statement is used to query or
retrieve data from a table in the database. A query may retrieve information from specified columns or from all
of the columns in the table. To create a simple SQL SELECT Statement, you must specify the column(s) name
and the table name. The whole query is called SQL SELECT Statement.
Syntax of SQL SELECT Statement:
SELECT column_list FROM table-name
[WHERE Clause]
[GROUP BY clause]
[HAVING clause]
[ORDER BY clause];
table-name is the name of the table from which the information is retrieved.
column_list includes one or more columns from which data is retrieved.
The code within the brackets is optional.
database table student_details;
id first_namelast_nameagesubject games
100Rahul Sharma 10 Science Cricket
101Anjali Bhagwat 12 Maths Football
102Stephen Fleming 09 Science Cricket
103Shekar Gowda 18 Maths Badminton
104Priya Chandra 15 Economics Chess
NOTE: These database tables are used here for better explanation of SQL commands. In reality, the tables can
have different columns and different data.
For example, consider the table student_details. To select the first name of all the students the query would be
like:
2. 8/10/13 SQL SELECT Statement
beginner-sql-tutorial.com/sql-select-statement.htm 2/3
SELECT first_name FROM student_details;
NOTE: The commands are not case sensitive. The above SELECT statement can also be written as "select
first_name from students_details;"
You can also retrieve data from more than one column. For example, to select first name and last name of all
the students.
SELECT first_name, last_name FROM student_details;
You can also use clauses like WHERE, GROUP BY, HAVING, ORDER BY with SELECT statement. We will discuss
these commands in coming chapters.
NOTE: In a SQL SELECT statement only SELECT and FROM statements are mandatory. Other clauses like
WHERE, ORDER BY, GROUP BY, HAVING are optional.
How to use expressions in SQL SELECT Statement?
Expressions combine many arithmetic operators, they can be used in SELECT, WHERE and ORDER BY Clauses of
the SQL SELECT Statement.
Here we will explain how to use expressions in the SQL SELECT Statement. About using expressions in WHERE
and ORDER BY clause, they will be explained in their respective sections.
The operators are evaluated in a specific order of precedence, when more than one arithmetic operator is used
in an expression. The order of evaluation is: parentheses, division, multiplication, addition, and subtraction. The
evaluation is performed from the left to the right of the expression.
For example: If we want to display the first and last name of an employee combined together, the SQL Select
Statement would be like
SELECT first_name + ' ' + last_name FROM employee;
Output:
first_name + ' ' + last_name
---------------------------------
Rahul Sharma
Anjali Bhagwat
Stephen Fleming
Shekar Gowda
Priya Chandra
You can also provide aliases as below.
SELECT first_name + ' ' + last_name AS emp_name FROM employee;
Output:
emp_name