QUESTION 10 Examine this code: CREATE OR REPLACE TRIGGER secure_emp BEFORE LOGON ON employees BEGIN IF (TO_CHAR(SYSDATE, 'DY') IN ('SAT', 'SUN')) OR (TO_CHAR(SYSDATE, 'HH24:MI') NOT BETWEEN '08:00' AND '18:00') THEN RAISE_APPLICATION_ERROR (-20500, 'You may insert into the EMPLOYEES table only during business hours.'); END IF; END; / What type of trigger is it? long
(A) DML trigger
(B) INSTEAD OF trigger
(C) Application trigger
(D) System event trigger
(E) This is an invalid trigger.

答案:登入後查看
統計: A(1), B(0), C(6), D(1), E(0) #912572