去掉 有重复数据的 情况

?

?merge into acl_user p
??? using (select * from testimportuser X where X.ROWID=(select max(Y.ROWID) from testimportuser Y where X.yhdm=Y.yhdm ) ) np
??? on (p.yhdm=np.yhdm)
??? when matched then
??? update set p.sfzmhm=np.sfzhm
??? when not matched then insert(p.yhdm,p.xm,p.sfzmhm,p.cjsj)values(np.yhdm,np.xm,np.sfzhm,sysdate)