In SQL Some Important commands are used to make the table useful with this statement
UPDATE:It is used to updates data in database.
It is used to delete data from database.
It is used to creates a new table.
It is used to modify the table.
It is used to deletes or remove a table.
It is used to creates a new database.
It modify a database.
It is used to inserts new data into a database.
It create an index (search key).
It is used to deletes an index.