問題與內蒙古在SQL服務器2005

Question

Select FileUpload.FileName AS FINAME, FileUpload.FilePath,MemberPersonalInformation.FirstName As SharedBy from FileUpload 
    INNER JOIN 
    ContentManagement ON ContentManagement.FileId=FileUpload.FileId 
    INNER JOIN 
    MemberPersonalInformation ON MemberPersonalInformation.MemberId=ContentManagement.CreatedBy 
    INNER JOIN 
    SubjectMaster ON ContentToIndividual.SubjectId=SubjectMaster.SubjectId 
    where 
    FileUpload.FileId in 
    (Select FileId from ContentManagement where ContentId in 
    (Select ContentId from ContentToIndividual where ShowToMemberId=12) 
    AND ContentManagement.ContentTypeId=1 and ContentManagement.SessionId=4) 

加入雖然我執行這個查詢在最後得到一個錯誤的JOIN說The multi-part identifier "ContentToIndividual.SubjectId" could not be bound.但我確實有兩個tables.I SubjectId無法理解什麼問題。請幫助我。

Answer 1

要加入SubjectMaster表到ContentToIndividual表，您以前沒有引用。

您需要加入到contentToIndvidual才能參考SubjectMaster加入。

例如

Select FileUpload.FileName AS FINAME, 
     FileUpload.FilePath,MemberPersonalInformation.FirstName As SharedBy 
from FileUpload 
    INNER JOIN 
    ContentManagement ON ContentManagement.FileId=FileUpload.FileId 
    INNER JOIN 
    MemberPersonalInformation ON MemberPersonalInformation.MemberId=ContentManagement.CreatedBy 
    -- You need to add it in here 
    Inner Join ContentToIndividual on SomeColumn = AnotherColumn 
    INNER JOIN 
    SubjectMaster ON ContentToIndividual.SubjectId=SubjectMaster.SubjectId 
    where 
    FileUpload.FileId in 
    (Select FileId from ContentManagement where ContentId in 
    (Select ContentId from ContentToIndividual where ShowToMemberId=12) 
    AND ContentManagement.ContentTypeId=1 and ContentManagement.SessionId=4) 

注意：即使你是在一個子查詢中查詢ContentToIndividual你不能引用列，如果它不是主要的選擇查詢的一部分。

Answer 2

您還沒有加入您的主要select語句中的ContentToIndividual。您需要添加或不參考它。

編輯：只需添加，你實際上不需要在主選擇中添加SubjectMaster或ContentToIndividual連接，因爲你沒有從任一表中選擇任何列 - 請記住，子查詢與主查詢;你只用它來獲取FileIds列表。也可以優化聲明的其餘部分。

Select FileUpload.FileName AS FINAME, FileUpload.FilePath,MemberPersonalInformation.FirstName As SharedBy from FileUpload 
    INNER JOIN 
    ContentManagement ON ContentManagement.FileId=FileUpload.FileId 
    INNER JOIN 
    MemberPersonalInformation ON MemberPersonalInformation.MemberId=ContentManagement.CreatedBy 
    where 
    FileUpload.FileId in 
    (Select FileId from ContentManagement where ContentId in 
    (Select ContentId from ContentToIndividual where ShowToMemberId=12) 
    AND ContentManagement.ContentTypeId=1 and ContentManagement.SessionId=4) 

編輯2：只是爲了好玩，我覺得這可能會簡化事情有點，因爲它擺脫了子查詢的，所以它應該是更快...

SELECT  FileUpload.FileName AS FINAME, FileUpload.FilePath,MemberPersonalInformation.FirstName As SharedBy 
FROM  FileUpload 
INNER JOIN ContentManagement ON ContentManagement.FileId=FileUpload.FileId 
      AND ContentManagement.ContentTypeId=1 
      AND ContentManagement.SessionId=4 
INNER JOIN ContentToIndividual ON ContentToIndividual.ContentId = ContentManagement.ContentId -- Iguessed at this join 
      AND ContentToIndividual.ShowToMemberId=12 
INNER JOIN MemberPersonalInformation ON MemberPersonalInformation.MemberId = ContentManagement.CreatedBy