What does the ALTER TABLE clause do ?

What does the ALTER TABLE clause do ?

• The SQL ALTER TABLE clause modifies a table definition by altering, adding, or deleting table column
• The SQL ALTER TABLE clause is used to insert data into database table
• The SQL ALTER TABLE deletes data from database table
• The SQL ALTER TABLE clause is used to delete a database table 

 

EXPLANATION

Answer is A. SQL ALTER TABLE:  Modifies a table definition by altering, adding, or dropping columns and constraints, reassigning and rebuilding partitions, or disabling or enabling constraints and triggers.

SOURCE

https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-table-transact-sql