MERGE INTO tableName t
USING Temp_tableName s
   ON t.gpi001 = s.gpi001
  AND t.gpi002 = s.gpi002
 WHEN MATCHED AND (t.gpi003 != s.gpi003
              OR t.gpi004 != s.gpi004
              OR t.gpi005 != s.gpi005)
      THEN UPDATE...

위 코드와 

MERGE INTO tableName t
USING Temp_tableName s
   ON t.gpi001 = s.gpi001
  AND t.gpi002 = s.gpi002
  AND (t.gpi003 != s.gpi003
       OR t.gpi004 != s.gpi004
       OR t.gpi005 != s.gpi005)
 WHEN MATCHED THEN...

위코드 중

AND (t.gpi003 != s.gpi003
       OR t.gpi004 != s.gpi004
       OR t.gpi005 != s.gpi005)

이부분을 WHEN MATCHED 위에 넣느냐

WHEN MATCHED 뒤에 AND로 연결하느냐(의 

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