SET SERVEROUTPUT ON CREATE OR REPLACE TRIGGER ASDF BEFORE INSERT OR DELETE OR UPDATE ON SEMP FOR EACH ROW BEGIN IF UPDATING THEN DBMS_OUTPUT.PUT_LINE('NOW ,YOU ARE GOING TO UPDATE ROW INTO TABLE SEMP'); ELSIF INSERTING THEN DBMS_OUTPUT.PUT_LINE('NOW,YOU ARE GOING TO INSERT ROW INTO A TABLE SEMP'); ELSIF DELETING THEN DBMS_OUTPUT.PUT_LINE('NOW,YOU ARE GOING TO DELETE ROW FROM TABLE SEMP'); END IF; END; / SHOW ERROR
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