详解Oracle自定义异常示例_oracle_

 declare v_count number; begin select count(*) into v_count from dept; if v_count < 10 then raise_application_error(-20001,'数量小于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('数量小于10'); when others then dbms_output.put_line('其他异常'); end;

 CREATE OR REPLACE PROCEDURE test_Exception_byLeejin ( ParameterA IN varchar, ParameterB IN varchar, ErrorCode OUT varchar --返回值,错误编码 ) AS /*以下是一些变量的定义*/ V NUMBER; V nvarchar(); V NUMBER; APP_EXP EXCEPTION; --自定义异常 BEGIN ErrorCode :=''; IF (ParameterA=ParameterB) THEN ErrorCode := 'ParameterA = ParameterB'; RAISE APP_EXP; -- 抛出异常 END IF; EXCEPTION WHEN APP_EXP THEN --在处理异常 RAISE_APPLICATION_ERROR(-,ErrorCode); WHEN OTHERS THEN RAISE_APPLICATION_ERROR(-,'未知异常'); END;