LISTAGG or WM_CONCAT in Netezza

问题

Any replacement or quick solution in NETEZZA for the Oracle function LISTAGG or WM_CONCAT ?

SELECT deptno, LISTAGG(ename, ',') WITHIN GROUP (ORDER BY ename) AS employee FROM emp GROUP BY deptno;

DEPTNO EMPLOYEE

---

    10 JOHN,MICHEL,SAM
    20 PHILIP,FORD,SCOT,SUNNY,JOSEPH
    30 ALLEN,RUBY,BETTY,MARTIN,LEON,FRANK

Thanks.

回答1:

IBM provides a sample UDF/UDA that may meet your needs. Look for GROUP_CONCAT on this page.

The direct link to source install file is here: group_concat.tgz.

TESTDB.ADMIN(ADMIN)=> select deptno, group_concat(employee,',') from gc_test group by deptno;
 DEPTNO |            GROUP_CONCAT
--------+------------------------------------
     10 | JOHN,MICHAEL,SAM
     20 | FORD,JOSEPH,PHILIP,SCOT,SUNNY
     30 | ALLEN,BETTY,FRANK,LEON,MARTIN,RUBY
(3 rows)

来源：https://stackoverflow.com/questions/27543129/listagg-or-wm-concat-in-netezza