1.分組求最
select xx.qssj from(select cm.persionid,cm.qssj,row_number() over(partition by cm.persionid order by cm.scrq desc) as rn
from RS_RSK_CONTRACT_MANAGE cm where cm.bak_flag is null) xx
where xx.persionid=a.id and xx.rn=1
2.記錄合併
wm_sys.wm_concat
3.limit of 2000 byte
oracle 10g release 2 一下, release2及以上buffer size無上限。
(1)set serveroutput on size 1000000;
(2)exec dbms_output.enable(999999999999999999);