Delete rows from a supertable

When you delete the rows of a supertable, the scope of the delete is a supertable and its subtables. Suppose you create a supertable person that has two subtables employee and sales_rep defined under it. The following DELETE statement on the person table can delete rows from all the tables person, employee, and sales_rep:

DELETE FROM person
   WHERE name ='Walker';

To limit a delete to rows of the supertable only, you must use the ONLY keyword in the DELETE statement. For example, the following statement deletes rows of the person table only:

DELETE FROM ONLY(person)
   WHERE name ='Walker';