用惯了sql server ，觉得在Oracle中存储过程中返回结果集有点麻烦。期待着某个未来，Oralce也支持在存储过程中直接调用select语句。下面举例演示一下如何在SQL*PLUS中调用存储过程并返回结果集。

1. 自定义一个ref cursor的变量

SQL> create or replace package types
2 as
3 type cursorType is ref cursor;
4 end;
5 /

Package created.

2. 建立一个存储过程，有一参数返回ref cursor 。

SQL> create or replace procedure ref_cursor(p_cursor out types.cursorType)
2 is
3 begin
4 open p_cursor for select * from emp;
5 end;
6 /

Procedure created.

3. 调用该存储过程

SQL> var myCursor refcursor
SQL> exec ref_cursor(:myCursor);

PL/SQL procedure successfully completed.

4. 打印结果集

SQL> print :myCursor;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10

14 rows selected.