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在VBA項目進行下面的語句時,我有這樣的錯誤消息:錯誤消息「的多部分標識符‘SupTr.AcYrPr’無法綁定
QueryString = "SELECT SUM(SuptTr.Am) " & _
"FROM " & Eget_firma & ".dbo.SupTr SuptTr, " &
Eget_firma & ".dbo.Actor Actor " & _
"WHERE Actor.Gr9 = " & Firma_internt & "
AND SuptTr.SupNo = Actor.SupNo AND SupTr.AcYrPr <= " & RegnPerTil & " "