帶有復合鍵的匯總功能

Question

SELECT CollMstHdr.EntryNo, CollMstHdr.Date, PartyMst.PName, SUM(CollMstDtl.Amt)
FROM CollMstHdr
  INNER JOIN CollMstDtl ON CollMstHdr.EntryNo = CollMstDtl.EntryNo
  INNER JOIN PartyMst ON CollMstHdr.SPartyCd = PartyMst.PartyCd
group by CollMstHdr.EntryNo, CollMstHdr.Date, PartyMst.PName

我想根據CollMstHdr.EntryNo和CollMstHdr.Date的總和，我有EntryNo和Date都是主鍵，但僅根據EntryNo獲得總和。 如何使用Clouse分組當我們有兩列作為主要行時。

Answer 1

首先根據您的表結構執行連接。 然后將列放在要對其進行分組的select和group by子句中。

例如，如果要對EntryNo和Date進行分組，請執行以下操作：

SELECT CollMstHdr.EntryNo, CollMstHdr.Date, SUM(CollMstDtl.Amt)
FROM CollMstHdr
  INNER JOIN CollMstDtl ON CollMstHdr.EntryNo = CollMstDtl.EntryNo
  INNER JOIN PartyMst ON CollMstHdr.SPartyCd = PartyMst.PartyCd
group by CollMstHdr.EntryNo, CollMstHdr.Date

如果只想對EntryNo進行分組，請執行以下操作：

SELECT CollMstHdr.EntryNo, SUM(CollMstDtl.Amt)
FROM CollMstHdr
  INNER JOIN CollMstDtl ON CollMstHdr.EntryNo = CollMstDtl.EntryNo
  INNER JOIN PartyMst ON CollMstHdr.SPartyCd = PartyMst.PartyCd
group by CollMstHdr.EntryNo