由 dawei
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)