Oracle merge into 使用记录

符合条件进行更新操作，不符合则进行插入操作．

merge into myd_nsrdt n
using (select ''as mydtmid,''as tmtype,''as nsrsbh,'' as nsrmc,
  'sn' as region,4 as pf,''as yj,'' as phone,'' as nowphone,sysdate as addtime from dual) m
on(n.mydtmid=m.mydtmid and n.nsrsbh=m.nsrsbh)
when matched then
  update set n.pf=m.pf,n.yj=m.yj
    where n.mydtmid=m.mydtmid and n.nsrsbh=m.nsrsbh
when not matched then
  insert values(seq_myd.nextval,m.mydtmid,m.tmtype,m.nsrsbh,m.nsrmc,m.region,m.pf,m.yj,m.phone,m.nowphone,m.addtime)