表数据
将group by 后重复的数据拼接起来
SELECT t.job, wmsys.wm_concat(t.ename) as naems, count(1)
FROM emp t
GROUP BY t.job;
将多行数据转为一行数据
select wm_concat(t.ename) names from emp t;
SELECT t.job, wmsys.wm_concat(t.ename) as naems, count(1)
FROM emp t
GROUP BY t.job;
select wm_concat(t.ename) names from emp t;