ORACLE 函數之listagg()使用

listagg()

1、普通函數

SQL> select listagg(ename,',')within group(order by sal)name from emp;

NAME
----------------------------------------------------------------------------------------------------
SMITH,JAMES,ADAMS,MARTIN,WARD,MILLER,TURNER,ALLEN,CLARK,BLAKE,JONES,FORD,SCOTT,KING

2、分組函數

SQL> select deptno,listagg(ename,',')within group(order by sal)name from emp group by deptno;

    DEPTNO NAME
---------- ----------------------------------------------------------------------------------------------------
MILLER,CLARK,KING
SMITH,ADAMS,JONES,FORD,SCOTT
JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE

 

3、分析函數

SQL> select deptno,ename,sal,listagg(ename,',')within group(order by sal)over(partition by deptno)name from emp;

    DEPTNO ENAME             SAL NAME
---------- ---------- ---------- ----------------------------------------
MILLER           1300 MILLER,CLARK,KING
CLARK            2450 MILLER,CLARK,KING
KING             5000 MILLER,CLARK,KING
SMITH             800 SMITH,ADAMS,JONES,SCOTT,FORD
ADAMS            1100 SMITH,ADAMS,JONES,SCOTT,FORD
JONES            2975 SMITH,ADAMS,JONES,SCOTT,FORD
SCOTT            3000 SMITH,ADAMS,JONES,SCOTT,FORD
FORD             3000 SMITH,ADAMS,JONES,SCOTT,FORD
JAMES             950 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
MARTIN           1250 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
WARD             1250 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
TURNER           1500 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
ALLEN            1600 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
BLAKE            2850 JAMES,MARTIN,WARD,TURNER,ALLEN,BLAKE
rows selected.