类型：转载 责任编辑：asp.net 日期：2007/05/23
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有一个table
id content
001 短路
001 短线
002 不明
...
select id,什么函数(content) as content from table group id
变成这样.
id content
001 短路,短线
002 不明
网友回答：
参考
SQL > select job,ename from emp;
JOB ENAME
--------- ----------
CLERK SMITH
SALESMAN ALLEN
SALESMAN WARD
MANAGER JONES
SALESMAN MARTIN
MANAGER BLAKE
MANAGER CLARK
ANALYST SCOTT
PRESIDENT KING
SALESMAN TURNER
CLERK ADAMS
JOB ENAME
--------- ----------
CLERK JAMES
ANALYST FORD
CLERK MILLER
已选择14行。
SQL > create or replace function f_ename(jobno in varchar2)
2 return varchar2 is
3
4 str_return varchar2(200);
5 cursor c_ename(v_jobno varchar2) is select ename from emp where job=v_jobno;
6 begin
7 for str_temp in c_ename(jobno) loop
8 str_return:=str_return | |str_temp.ename;
9 end loop;
10 return str_return;
11 end;
12 /
函数已创建。
SQL > select f_ename(job) from (
2 select distinct job from emp);
F_ENAME(JOB)
---------------------------------------
SCOTT FORD
SMITH ADAMS JAMES MILLER
JONES BLAKE CLARK
KING
ALLEN WARD MARTIN TURNER
SQL >
加上job列：
SQL > select job,f_ename(job) from (
2 select distinct job from emp);
JOB F_ENAME(JOB)
-------------------------------------------------------
ANALYST SCOTT FORD
CLERK SMITH ADAMS JAMES MILLER
MANAGER JONES BLAKE CLARK
PRESIDENT KING
SALESMAN ALLEN WARD MARTIN TURNER
这个函数只能自己自己编了