declare v_count number;begin select count(*) into v_count from dept;if v_count < 10 then raise_application_error(-20001,'數量小于10');end if;end; 

declare v_count number;my_exp exception;begin select count(*) into v_count from dept;if v_count < 10 then raise my_exp;end if;exception when my_exp then dbms_output.put_line('數量小于10');when others then dbms_output.put_line('其他異常');end;

CREATE OR REPLACE PROCEDURE test_Exception_byLeejin(ParameterA IN varchar,ParameterB IN varchar,ErrorCode OUT varchar --返回值,錯誤編碼)AS/*以下是一些變量的定義*/V NUMBER;V nvarchar();V NUMBER; APP_EXP EXCEPTION; --自定義異常BEGINErrorCode :='';IF (ParameterA=ParameterB) THENErrorCode := 'ParameterA = ParameterB';RAISE APP_EXP; -- 拋出異常END IF;EXCEPTIONWHEN APP_EXP THEN --在處理異常RAISE_APPLICATION_ERROR(-,ErrorCode);WHEN OTHERS THEN RAISE_APPLICATION_ERROR(-,'未知異常');END;