本文介绍了Oracle数据库中用于列表聚合的两种方法：listagg()函数与wm_concat函数。这两种方法分别适用于Oracle11g及以上版本和Oracle10g及以前版本。通过实际案例展示了如何使用这些函数按部门对员工姓名进行聚合，并按姓名排序。
listagg( ) within group ( order by ) 与 wm_concat
--oracle 11g 及以后适合 最好
select spbywslid,listagg(xm,',') within group (order by spbywslid) col_name from tpg_jtcyqk group by spbywslid;
--oracle 10g 及以前版本用
select spbywslid,wm_concat(xm)xm from tpg_jtcyqk group by spbywslid;
select deptno,wm_concat(ename)name,count(*)rs from emp group by deptno
select deptno,listagg(ename,',') within group (order by ename ) aa from emp group by deptno
select deptno,listagg(ename,',') within group (order by ename ) aa,count(*)bb from emp group by deptno
--oracle 11g 及以后适合 最好
select spbywslid,listagg(xm,',') within group (order by spbywslid) col_name from tpg_jtcyqk group by spbywslid;
--oracle 10g 及以前版本用
select spbywslid,wm_concat(xm)xm from tpg_jtcyqk group by spbywslid;
select deptno,wm_concat(ename)name,count(*)rs from emp group by deptno
select deptno,listagg(ename,',') within group (order by ename ) aa from emp group by deptno
select deptno,listagg(ename,',') within group (order by ename ) aa,count(*)bb from emp group by deptno
扫一扫
8221
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
