爲什麼在MS Access中工作的SQL查詢不能在SQL Server中工作？

Question

下面的查詢工作在MS Access，但它並沒有在MS SQL Server的工作：「附近關鍵字‘組’語法錯誤」

SELECT 
    tblSession.PatientID as PID, 
    max(tblSession.SessionAttend) - 
    min(tblSession.SessionAttend) + 1 as NumSA, 
    max(tblSession.SessionSched) - 
    min(tblSession.SessionSched) + 1 as NumSS FROM 
    (
    SELECT top 100 percent 
     tblSession.PatientID, 
     tblSession.SessionNumber, 
     tblSession.SessionDate, 
     tblSession.SessionAttend, 
     tblSession.SessionSched FROM 
     tblPatient INNER JOIN tblSession ON 
     tblPatient.PatientID = tblSession.PatientID) WHERE 
     (tblSession.SessionDate >= '12/8/2010') AND 
     (tblSession.SessionDate <= '5/18/2011') AND 
     (tblSession.Status = '2') ORDER BY 
      tblSession.PatientID, tblSession.SessionNumber 
) GROUP BY tblSession.PatientID 

在SQL Server，它給人的錯誤當我將鼠標懸停在GROUP關鍵字上時，工具提示顯示「GROUP」附近的語法錯誤，期望AS，ID或QUOTED_ID。「我不明白。任何人都可以告訴我如何使這個查詢工作？

Answer 1

在()派生表需要的別名，在SELECT列表中的列引用相應的更新：

SELECT top 100 percent 
    ALIASNAME.PatientID as PID, 
    max(ALIASNAME.SessionAttend) - 
    min(ALIASNAME.SessionAttend) + 1 as NumSA, 
    max(ALIASNAME.SessionSched) - 
    min(ALIASNAME.SessionSched) + 1 as NumSS FROM 
    (
    SELECT top 100 percent 
     tblSession.PatientID, 
     ... 
     ... 
     ... 
     ... 
      tblSession.PatientID, tblSession.SessionNumber 
    -- This derived table needs an alias 
) ALIASNAME 
    GROUP BY ALIASNAME.PatientID