假设我有一个名为Student的表,该表具有3个属性,即学生编号,姓名和喜欢的颜色,当我调用此过程时,如下所示:
execute favColor('RED');
输出应为:
NAME FAV_COLOR
-------- -----------
MARY RED
JANE RED
PETER RED
JOHN RED
我可以使用示例代码来执行此操作吗?到目前为止,我只看到过程插入或更新记录,并且如果过程中有一个select语句,则必须有一个in子句,这是否意味着过程不可能显示此输出?
由于我没有您的桌子,我将乔布斯(Scott's)与工作一起使用,而不是颜色。
样本数据:
SQL> select ename, job from emp order by job, ename;
ENAME JOB
---------- ---------
FORD ANALYST
SCOTT ANALYST
ADAMS CLERK
JAMES CLERK
MILLER CLERK
SMITH CLERK
BLAKE MANAGER
CLARK MANAGER
JONES MANAGER
KING PRESIDENT
ALLEN SALESMAN
MARTIN SALESMAN
TURNER SALESMAN
WARD SALESMAN
14 rows selected.
程序将退回有特定工作的雇员:
SQL> create or replace procedure favJob (par_job in varchar2, par_rc out sys_refcursor)
2 is
3 begin
4 open par_rc for
5 select ename, job
6 from emp
7 where job = par_job
8 order by ename;
9 end;
10 /
Procedure created.
测试:
SQL> var rc refcursor
SQL> exec favJob('MANAGER', :rc);
PL/SQL procedure successfully completed.
SQL> print rc
ENAME JOB
---------- ---------
BLAKE MANAGER
CLARK MANAGER
JONES MANAGER
SQL>