Commands used to create or modify database tables are called data definition language (DDL) commands. code example

Example: what is data definition language

DDL
1-It stands for Data Definition Language.
2-It is used to create database schema and can
be used to define some constraints as well.	
3-It basically defines the column (Attributes) of the table.	
4-It doesn’t have any further classification.
5-Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc.
6-DDL does not use WHERE clause in its statement.