1、例外分类:系统例外、自定义例外
(1)系统例外,参见相关API文档
(2)自定义例外
定义自己的例外:就像自定义变量一样,类型为exception
抛出例外:使用raise抛出自定义例外
set serveroutput on declare cursor cemp is select ename from emp where deptno=50; pename emp.ename%type; --self define exception self_no_data_found exception; begin open cemp; fetch cemp into pename; if cemp%notfound then --throw self define exception raise self_no_data_found; end if; exception when self_no_data_found then dbms_output.put_line(‘执行了自定义异常!‘); if cemp%isopen then dbms_output.put_line(‘close cursor!‘); close cemp; end if; when others then dbms_output.put_line(‘执行了others异常!‘); if cemp%isopen then close cemp; end if; end; /
运行结果:
原文地址:https://www.cnblogs.com/ZeroMZ/p/9326749.html
时间: 2024-10-09 10:42:36