Which one of the following statements is NOT a valid use for the sp_addtype stored procedure to create a user-defined data type?

56.

EXEC sp_addtype logo, 'image', 'NULL'

EXEC sp_addtype sex, 'CHAR(1)', 'NOT NULL'

EXEC sp_addtype hiredate, datetime

EXEC sp_addtype timevalue, 'timestamp'

None of the above.

User-defined data types cannot be defined using the SQL Servertimestamp data type.