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DDL is stands for data definition language. DDL command are used to perform operation on table. We have total 7 DDL command which are...
SQL is stands for structured query language it used to store relational databases using Queries. Queries are used to communicate with the database.
Varchar stores the character up to 2000 byte whereas varchar2 stores the character up to 4000 bytes. varchar holds the unused space whereas varchar2...