Question

Refer to the Teacher and Class tables. When Bryan McNeal was deleted from the Teacher table, the TeacherID for the Web Development course was automatically changed to 11234. Which foreign key action is the TeacherID likely using? (Ch.2)

Answer 1

The foreign key action used in this scenario is ON DELETE CASCADE.

Step-by-step explanation:

The TeacherID for the Web Development course being automatically changed to 11234 when Bryan McNeal was deleted from the Teacher table suggests that the foreign key action used is ON DELETE CASCADE.

With this action, when a record is deleted from the referenced table (Teacher), all related records in the referencing table (Class) will be automatically deleted as well. In this case, when Bryan McNeal was deleted from the Teacher table, the corresponding record in the Class table associated with the Web Development course was also deleted, resulting in the TeacherID being changed to 11234.