試題詳解

複選題
QUESTION 65 Which three statements are true regarding database triggers? (Choose three) acd
(A) A database trigger is a PL/SQL block, C, or Java procedure associated with a table, view, schema, or the database.
(B) A database trigger needs to be executed explicitly whenever a particular event takes place.
(C) A database trigger executes implicitly whenever a particular event takes place.
(D) A database trigger fires whenever a data event (such as DML) or system event (such as logon, shutdown) occurs on a schema or database.
(E) With a schema, triggers fire for each event for all users; with a database, triggers fire for each event for that specific user.