13PL_SQL过程之错误处理即捕获异常

declare

  v_temp number(4);

begin

  select empno into v_temp from emp where deptno=10;

  exception

    when too_many_rows then

      dbms_output.put_line('太多记录了');

    when others then

      dbms_output.put_line('error!');

end;

declare

  v_temp number(4);

begin

  select empno into v_temp from emp where empno=2222;

  exception

    when no_data_found then

      dbms_output.put_line('没有数据');

end;