oracle wm_concat 用法

<pre name="code" class="sql">with tmp_0042 as (
SELECT F003D_0042, F008V_0042,F007N_0042,F006B_0042,OB_RECTIME_0042,OB_TEXTID_0042,F002D_0042,F004V_0042
FROM TB_TEXT_0042
WHERE TO_CHAR(OB_RECTIME_0042, 'yyyy-MM-dd') = '2013-01-04'
)
--select * from tmp_0042
SELECT D.*, E.F006B_0042
FROM
(SELECT F003D_0042,F008V_0042,F007N_0042,OB_RECTIME_0042,OB_TEXTID_0042,F002D_0042,F004V_0042,B.OB_SECCODE_0045,C.OB_SORTCODE_0043
FROM tmp_0042 A,(select OB_TEXTID_0045, WM_CONCAT(OB_SECCODE_0045) OB_SECCODE_0045
from TB_TEXT_0045 t0045, tmp_0042 t0042
where t0042.OB_TEXTID_0042=t0045.OB_TEXTID_0045
and F001V_0045 IN ('QDII','LOF','ETF','老基金','开放式基金','封闭式基金')
group by OB_TEXTID_0045) B,(select OB_TEXTID_0043, WM_CONCAT(OB_SORTCODE_0043）OB_SORTCODE_0043
from TB_TEXT_0043 t0043, tmp_0042 t0042
where t0042.OB_TEXTID_0042=t0043.OB_TEXTID_0043
group by OB_TEXTID_0043) C
WHERE A.OB_TEXTID_0042=B.OB_TEXTID_0045(+)AND A.OB_TEXTID_0042 =C.OB_TEXTID_0043(+)
) D,tmp_0042 E
WHERE D.OB_TEXTID_0042 = E.OB_TEXTID_0042