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Oracle£º TO_NUMBER(TO_CHAR(SYSDATE, 'YYYYMMDD'))
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Oracle£º ROWID
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       Oracle£º UPDATE ITEM_MST SET
                       HISD_FLAG = 1
                   WHERE
                      ROWID = C2.ROWID;
       Sqlserver : UPDATE ITEM_MST SET
                             HISD_FLAG = 1        --AND ROWNUM = 1  ---KEY
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