Structured Query Language (SQL) in DBMS What Is SQL What Is Structured Query Language (SQL)

1. StructuredQuery
Language
Syed Hassan Ali Hashmi
Syed Asad Abbas Rizvi
Azhar Uddin

2. What is
Structured
Query
Language
Structured Query Language is a standard Database language which
is used to create, maintain and retrieve the relational database.
What is Relational Database?
Relational database means the data is stored as well as retrieved in
the form of relations (tables).

3. HistoryOfSQL
 the original version of SQL called SEQUEL
(structured English query language) was designed by
an IBM research center in 1974 and 1975. SQL was first introduced
as a commercial database system in 1979 by Oracle Corporation.
 SQL became a standard of the American National Standards
Institute (ANSI) in 1986, and of the InternationalOrganization for
Standardization (ISO) in 1987

4. WhySQL?
 SQL is very simple and easy to learn
 Allows users to access data in the relational database
management systems.
 Allows users to describe the data.
 Allows users to define the data in a database and manipulate that
data.
 Allows to embed within other languages using SQL modules,
libraries & pre-compilers.
 Allows users to create and drop databases and tables.
 Allows users to set permissions on tables and views.

5. Several Parts
OfSQL
 DDL (Data Definition Language)
 DML (Data Manipulation Language)
 DCL (Data Control Language)
 TCL (Transaction Control Language)

6. DDL: Data
Definition
Language
 Data Definition Language is used to define the database structure
or schema. DDL is also used to specify additional properties of the
data.
 This includes changes to the structure of the table like creation of
table or database , altering table, deleting a table , truncate table
or rename a table etc.

7. DML: Data
Manipulation
Language
DML deals with data manipulation, and includes most common SQL
statements such SELECT, INSERT, UPDATE, DELETE and it is used
to store, modify, retrieve, delete and update data in database

8. DCL: Data
Control
Language
Data control language are the commands to grant and take back
authority from any database user.

9. TCL:
Transaction
Control
Language
TransactionControl Language(TCL) commands are used to manage
transactions in the database.These are used to manage the changes
made to the data in a table by DML statements. It also allows
statements to be grouped together into logical transactions.

10. Roles ofSQL
 SQL retrieves data from the database.
 It can be used along with programming language to access data
from database. It is a database programming language.
 It can be used to monitor and control data access by various users.
It is a database administration language.
 It can be used as an Internet data access language.

11. AnyQuestion
would be
Appreciated!