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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.
Oracle is a database which stores the permanently into the secondary storage device. Oracle stores the data into a structure format.
Varchar stores the character up to 2000 byte whereas varchar2 stores the character up to 4000 bytes. varchar holds the unused space whereas varchar2...