ORACLE 字符串定位、截取

发布时间：2020-12-12 15:42:32 所属栏目：百科来源：网络整理

导读：SQL select d.deptno,wm_concat(e.ename) nn 2 from emp e,dept d 3 where e.deptno = d.deptno 4 group by d.deptno; DEPTNO NN ---------- -------------------------------------------------- 10 CLARK,KING,MILLER 20 SMITH,FORD,ADAMS,SCOTT,JONES 30 A

SQL> select d.deptno,wm_concat(e.ename) nn 2 from emp e,dept d 3 where e.deptno = d.deptno 4 group by d.deptno; DEPTNO NN ---------- -------------------------------------------------- 10 CLARK,KING,MILLER 20 SMITH,FORD,ADAMS,SCOTT,JONES 30 ALLEN,BLAKE,MARTIN,TURNER,JAMES,WARD SQL> select d.deptno,2 decode(instr(wm_concat(e.ename),',1,3),3 0,4 wm_concat(e.ename),5 substr(wm_concat(e.ename),6 1,7 instr(wm_concat(e.ename),3) - 1)) nn 8 from emp e,dept d 9 where e.deptno = d.deptno 10 group by d.deptno; DEPTNO NN ---------- -------------------------------------------------- 10 CLARK,ADAMS 30 ALLEN

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