Oracle--异常处理CREATE OR REPLACE TRIGGER tr_insert_empBEFORE INSERT ON employeesFOR EACH ROWBEGINI
Oracle--异常处理 CREATE OR REPLACE TRIGGER tr_insert_empBEFORE INSERT ON employeesFOR EACH ROWBEGIN IF :new.first_name IS NULL OR :new.last_name is null THEN RAISE_APPLICATION_ERROR(-20000,'Employee must have a name.'); END IF;END;????
