SQL stands for Structured Query Language. It is easy and allows you to create a database. It is an ANSI language which allows an user to write queries to access, modify and delete the customize data. SQL consist of data definition language (DDL) and data manipulation language (DML).
Data Definition Language : It is used to create, alter, drop or delete new database tables. You can also create indexes and even make a link between tables. The selected keywords which are used to perform the particular task are as under:
CREATE TABLE - creates a new table
ALTER TABLE - alters a database table
DROP TABLE - deletes a database table
CREATE INDEX - creates an index (search key)
DROP INDEX - deletes an index
Data Manipulation Language : It is used to getting, insert, delete and update data in database and tables. The selected keywords which are used to perform the particular task are as under:SELECT - displays data from table
UPDATE - updates data in table
DELETE - deletes data from table
INSERT INTO - inserts new data into table
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Posted on: September 15, 2007 If you enjoyed this post then why not add us on Google+? Add us to your Circles