Question

我想在底部概括我的查询，以便获得所有项目和其他项目信息，其中我的子组具有一定的值，但我无法使其工作，因为我无法获得[ProjectFk]

SELECT 
      [HeadCount].[ID],
      [LinkProjectAreaFk],
      [Month1],
      [Month2],
      [Month3],
      [Month4],
      [Month5],
      [Month6],
      [Month7],
      [Month8],
      [Month9],
      [Month10],
      [Month11],
      [Month12],
      [HcYear],
      [ApproveDirFk],
      [ApproveDirDate],
      [FreezeFk],
      [freezeDate],
      [CDSID],[FreezeTypeFk],
      [ApproveDirTypeFk],
      [SourcesFk], 
      [Project].[Title], 
      [Project].[Title]
FROM 
     [HeadCount], 
      [Project] 
WHERE 
      [HeadCount].[LinkProjectAreaFk] 
   IN 
      (SELECT 
               [ID] 
       FROM 
               [LinkProject-Area]
       WHERE
       [SubgroupFk]=1)
  and
       [Project].[ID]=[LinkProject-Area].[ProjectFk]

以下查询有效，但仅适用于一个项目，我如何从子查询中获取projectFk，因为当我查看它时，他们说这是不可能的，并且使用左外连接我不能让它工作在所有

SELECT 
      [HeadCount].[ID],
      [LinkProjectAreaFk],
      [Month1],
      [Month2],
      [Month3],
      [Month4],
      [Month5],
      [Month6],
      [Month7],
      [Month8],
      [Month9],
      [Month10],
      [Month11],
      [Month12],
      [HcYear],
      [ApproveDirFk],
      [ApproveDirDate],
      [FreezeFk],
      [freezeDate],
      [CDSID],
      [FreezeTypeFk],
      [ApproveDirTypeFk],
      [SourcesFk], 
      [Project].[Title],
       [Project].[Title]
FROM 
      [HeadCount], 
       [Project] 
WHERE 
       [HeadCount].[LinkProjectAreaFk] IN 
      (SELECT 
            [ID] 
       FROM 
             [LinkProject-Area] 
       WHERE 
             [ProjectFk]=90 
       and 
             [SubgroupFk]=1)
        and 
             [Project].[ID]=90

希望你能帮助我或指出我正确的方向

亲切的问候

嗨，我一直在尝试你的方式，但它仍然没有按照它应有的方式：我无法绑定多部分标识符“MyCTE.ProjectFK”。和无法绑定多部分标识符“MyCTE.ID”。当我查看这个错误与使用我的联接错误任何想法有关时？

     ;WITH MyCTE (ID, ProjectFK) 
    AS 
    (     
    SELECT 
           ID, 
            ProjectFk     
    FROM 
           [LinkProject-Area]     
    WHERE 
           SubgroupFk = 1 
    ) 

    SELECT 
           * 
   FROM 
             [LinkProject-Area] 
   INNER JOIN 
          HeadCount ON [LinkProjectAreaFk] = MyCTE.ID 
    INNER JOIN
           Project ON Project.ID = MyCTE.ProjectFK

Answer 1

我认为你会想要像这样组织这个查询：

SELECT ...
FROM
(
    SELECT ID, ProjectFk
    FROM [LinkProject-Area]
    WHERE SubgroupFk = 1
) LinkProjectAreas
INNER JOIN HeadCount ON LinkProjectAreaFK = LinkProjectAreas.ID
INNER JOIN Project ON Project.ID = LinkProjectAreas.ProjectFK

您还可以使用公用表表达式（CTE）来组织它：

;WITH LinkProjectAreas (ID, ProjectFK) AS
(
    SELECT ID, ProjectFk
    FROM [LinkProject-Area]
    WHERE SubgroupFk = 1
)
SELECT ...
FROM LinkProjectAreas
INNER JOIN HeadCount ON LinkProjectAreaFK = LinkProjectAreas.ID
INNER JOIN Project ON Project.ID = LinkProjectAreas.ProjectFK

子查询中的多个值

1 个答案: