Q. What is SQL?
SQL (Structured Query Language), It is also pronounced as “SEQUEL” and it an Non-procedural Language which is used to operate all relational database. And it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, updation, insertion and deletion of data from a database.

Features of SQL:
1. Portability
2. Client server architecture,
3. Dynamic data definition,
4. Multiple views of data,
5. Complete database language,
6. Interactive,
7. High level,
8. Structure and SQL standards.

Q. What are the different types of SQL’s statements?
1. DQL - Data Query Language ( or) Data Retrival Language

SELECT Statement

2. DML – Data Manipulation Language
DML is used for manipulation of the data itself.

INSERT Statement
UPDATE Statement
DELETE Statement

3. DDL – Data Definition Language
DDL is used to define the structure that holds the data.

CREATE Statement
ALTER Statement
DROP Statement
RENAME Statement
TRUNCATE Statement

4. DCL – Data Control Language
DCL is used to control the visibility of data.

GRANT Statement
REVOKE Statement

5. TCL - Transaction Control Language

COMMIT Statement
ROLLBACK Statement
SAVEPOINT Statement

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