具有多列的"Where IN"(SQL Server)

Question

我正在使用SQL Server 2005.

查询看起来像这样

Select col1, col2, col3 from <subquery> where (col1,col2) in <subquery>

SQL Server似乎不喜欢这样.任何实现任何人都知道的方式不涉及转换为varchars或其他任何混乱？

这是实际的查询.

SELECT * 
FROM         
 (
    SELECT NEWID() AS guid, UserID, RoleId, ClubId, 0 AS GroupRole
    FROM dbo.Portal_UserRoles

    UNION

    SELECT NEWID() AS guid, dbo.Portal_UserGroups.UserId, 
           dbo.Portal_GroupRoles.RoleId, dbo.Portal_UserGroups.ClubId, 
           dbo.Portal_GroupRoles.GroupId AS GroupRole
    FROM dbo.Portal_GroupRoles 
    INNER JOIN dbo.Portal_UserGroups 
        ON dbo.Portal_GroupRoles.GroupId = dbo.Portal_UserGroups.GroupId
  ) AS derivedtbl_1
WHERE (derivedtbl_1.RoleId,derivedtbl_1.ClubId) IN 
      (
         SELECT Portal_GroupRoles.RoleId, Portal_ClubGroups.ClubId
         FROM Portal_GroupRoles 
         INNER JOIN Portal_ClubGroups
             ON Portal_GroupRoles.GroupId = Portal_ClubGroups.GroupId
      )

Answer 1

执行所需操作的标准,经典方法是EXISTS子句:

SELECT * 
    FROM         
    (
        SELECT NEWID() AS guid, UserID, RoleId, ClubId, 0 AS GroupRole
        FROM dbo.Portal_UserRoles

        UNION

        SELECT NEWID() AS guid, dbo.Portal_UserGroups.UserId, 
               dbo.Portal_GroupRoles.RoleId, dbo.Portal_UserGroups.ClubId, 
               dbo.Portal_GroupRoles.GroupId AS GroupRole
            FROM dbo.Portal_GroupRoles 
                 INNER JOIN dbo.Portal_UserGroups 
                 ON dbo.Portal_GroupRoles.GroupId = dbo.Portal_UserGroups.GroupId
    ) AS derivedtbl_1
WHERE EXISTS
  (
     SELECT Portal_GroupRoles.RoleId, Portal_ClubGroups.ClubId
         FROM (Portal_GroupRoles 
               INNER JOIN Portal_ClubGroups
               ON Portal_GroupRoles.GroupId = Portal_ClubGroups.GroupId) AS cgr
         WHERE derivedtbl_1.RoleID = cgr.RoleId
           AND derivedtbl_1.ClubId = cgr.ClubId
  )

要小心将两列条件分成两个独立的IN子句; 它在一个EXISTS子句中应用两列条件时,不会给出相同的答案(一般).

Answer 2

在派生表上进行连接而不是使用 in

SELECT * 
FROM  
  (
    SELECT NEWID() AS guid, UserID, RoleId, ClubId, 0 AS GroupRole 
    FROM dbo.Portal_UserRoles 

    UNION 

    SELECT NEWID() AS guid, dbo.Portal_UserGroups.UserId, 
           dbo.Portal_GroupRoles.RoleId, dbo.Portal_UserGroups.ClubId,
           dbo.Portal_GroupRoles.GroupId AS GroupRole 
    FROM dbo.Portal_GroupRoles 
    INNER JOIN dbo.Portal_UserGroups 
        ON dbo.Portal_GroupRoles.GroupId = dbo.Portal_UserGroups.GroupId
  ) AS derivedtbl_1 

INNER JOIN 
  (
    SELECT Portal_GroupRoles.RoleId, Portal_ClubGroups.ClubId 
    FROM Portal_GroupRoles 
    INNER JOIN Portal_ClubGroups 
        ON Portal_GroupRoles.GroupId = Portal_ClubGroups.GroupId
  ) derivedtbl_2
    ON derivedtbl_1.RoleID = derivedtbl_2.RoleID 
      AND derivedtbl_1.ClubId = derivedtbl_2.ClubId

Answer 3

你必须分成两个子句

 where col1 in (...) AND col2 in (...)

或者你可以稍微重构一下

select * FROM (
     SELECT NEWID() AS guid, UserID, RoleId, ClubId, 0 AS GroupRole FROM dbo.Portal_UserRoles 
     UNION 
     SELECT NEWID() AS guid, dbo.Portal_UserGroups.UserId, dbo.Portal_GroupRoles.RoleId, dbo.Portal_UserGroups.ClubId, dbo.Portal_GroupRoles.GroupId AS GroupRoles FROM dbo.Portal_GroupRoles INNER JOIN dbo.Portal_UserGroups ON dbo.Portal_GroupRoles.GroupId = dbo.Portal_UserGroups.GroupId) 
     AS derivedtbl_1, Portal_GroupRoles, Portal_ClubGroup
where derivedtbl_1.RoleId = Portal_GroupRoles.RoleId
and derivedtbl_1.ClubId = Portal_ClubGroups.ClubId
and Portal_GroupRoles.GroupId = Portal_ClubGroups.GroupId