merge into在oracle10g和oracle 11g中的使用差别一

oracle10g上的代码

MERGE INTO TCGGYSGHCP CP
    USING (SELECT *
             FROM (SELECT QD.LIFNR,
                          QD.MATNR,
                          MAX(MX.DATAB) DATAB,
                          MAX(MX.DATBI) DATBI,
                          QD.LOEKZ,
                          QD.SESSIONID,
                          MAX(QD.CREATEDATE) CREATEDATE,
                          QD.STATUS
                     FROM T_SAP2SCF_GHCP QD
                     LEFT JOIN A018 MX
                       ON MX.SESSIONID = QD.SESSIONID
                      AND MX.MATNR = QD.MATNR
                      AND MX.LIFNR = QD.LIFNR
                    WHERE QD.SESSIONID = P_SESSIONID
                    GROUP BY QD.LIFNR,
                             QD.MATNR,
                             QD.LOEKZ,
                             QD.SESSIONID,
                             QD.STATUS)) T
    ON (CP.WLBM = T.MATNR AND CP.GYSBM = T.LIFNR)
    WHEN MATCHED THEN
      UPDATE
         SET CP.ISDELETE  = T.LOEKZ,
             CP.TCCYTZSRQ = T.DATAB,
             CP.TCQXTZSRQ = T.DATBI,
             CP.GYSMC    =
             (SELECT XX.GYSMC FROM TCGGYSXX XX WHERE XX.GYSBM = T.LIFNR),
             CP.WLMC     =
             (SELECT WL.WLMC FROM TPRIWLZSJ WL WHERE WL.WLBM = MATNR)
    WHEN NOT MATCHED THEN
      INSERT
        (ZZBM,
         ZZXLH,
         WLBM,
         WLMC,
         ISDELETE,
         TCCYTZSRQ,
         TCQXTZSRQ,
         GYSBM,
         GYSMC)
      VALUES
        ('5920',
         '1003',
         MATNR,
         (SELECT WL.WLMC FROM TPRIWLZSJ WL WHERE WL.WLBM = MATNR),
         LOEKZ,
         DATAB,
         DATBI,
         LIFNR,
         (SELECT XX.GYSMC FROM TCGGYSXX XX WHERE XX.GYSBM = T.LIFNR));

这段代码在oracle11g中编译报错

经过跟踪发现   子操作中的子查询去掉就可以，在此可以把子操作中的子查询数据放入到主查询中，子操作直接引用即可。