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良い方法

2012-04-12 4 views
3

これが私のテーブルのとき：良い方法

[Member]: 
{ [Id], [UserId], [UserName], [Email], [Status_Id], [MemberType_Id] } 

[CustomerProfile] : 
{ [Id], [Member_Id], [FirstName], [LastName], [SSN], [Gender], [PostalCode],[City_Id], [Address]} 


[DealerProfile]: 
{ [Id], [Member_Id], [FirstName], [LastName], [SSN], [Gender], [StoreName], [PostalCode], [City_Id], [Address] } 


[ManagerProfile] 
{ [Id], [Member_Id], [FirstName], [LastName], [SSN], [Gender] } 

[City]: 
{ [Id], [Title], [Province_Id] }

だから私は、私は、次の選択を開始するつもりです、私のすべてのメンバーとの関連列の完全なビューを作成する必要がありますクエリ：

SELECT  
[ME].[Id] AS [MemberId], 
[ME].[UserId], 
[ME].[UserName], 
[ME].[Email], 
[ME].[Status_Id], 
[ST].[Title] AS [Status], 
[ME].[MemberType_Id], 
[MT].[Title] AS [MemberType], 

CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[Id] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[Id] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN [MAP].[Id] 
    ELSE 0 END AS [Profile_Id], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[FirstName] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[FirstName] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN [MAP].[FirstName] 
    ELSE 'Unknown' END AS [FirstName], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[LastName] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[LastName] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN [MAP].[LastName] 
    ELSE 'Unknown' END AS [LastName], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[SSN] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[SSN] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN [MAP].[SSN] 
    ELSE 'Unknown' END AS [SSN], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[Address] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[Address] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN '' 
    ELSE 'Unknown' END AS [Address], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[PostalCode] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[PostalCode] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN '' 
    ELSE 'Unknown' END AS [PostalCode], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[Gender] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[Gender] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN [MAP].[Gender] 
    ELSE 'Unknown' END AS [Gender], 
CASE 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') THEN [CUP].[City_Id] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') THEN [DEP].[City_Id] 
    WHEN [ME].[MemberType_Id] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') THEN 0 
    ELSE 0 END AS [CityId] 

FROM [Members].[Member] AS [ME] 
INNER JOIN [Members].[MemberType] AS [MT] ON [ME].[MemberType_Id] = [MT].[Id] 
INNER JOIN [Members].[Status] AS [ST] ON [ME].[Status_Id]=[ST].[Id] 
INNER JOIN [Members].[ManagerProfile] AS [MAP] ON [ME].[Id]= [MAP].[Member_Id] 
INNER JOIN [Members].[CustomerProfile] AS [CUP] ON [ME].[Id]=[CUP].[Member_Id] 
INNER JOIN [Members].[DealerProfile] AS [DEP] ON [ME].[Id]=[DEP].[Member_Id]; 
GO

繰り返されるケースがあります。メンバータイプを見つけて、どのテーブルの選択値を決定するかを繰り返します。私のようなビューを作成するのは良い考えですか？メンバーの種類を確認する方法はありますか？私はMemberTypeテーブル内のId列は変更できるので、私はこのようなものを使用したくないと言及する必要があります：WHEN [ME].[MemberType_Id] = 1 Then ''あなたの提案は何ですか？これについて

出典

2012-04-12 Saeid

答えて

0

何：

CASE 
    WHEN [MT].[Title]='Customer' THEN [CUP].[FirstName] 
    WHEN [MT].[Title]='Dealer' THEN [DEP].[FirstName] 
    WHEN [MT].[Title]='Manager' THEN [MAP].[FirstName] 
    ELSE 'Unknown' END AS [FirstName]

出典

2012-04-12 06:48:36 Saeid

0

あなたのタイプでもCROSS JOINできました。あなたはまだtypidとcaseのステートメントを比較する方がずっと読みやすくなります。このように：

SELECT  
    [ME].[Id] AS [MemberId], 
    [ME].[UserId], 
    [ME].[UserName], 
    [ME].[Email], 
    [ME].[Status_Id], 
    [ST].[Title] AS [Status], 
    [ME].[MemberType_Id], 
    [MT].[Title] AS [MemberType], 
    a.ID, 
    a.FirstName, 
    a.LastName, 
    a.SSN, 
    a.Address, 
    a.PostalCode, 
    a.Gender, 
    a.City_Id 
FROM [Members].[Member] AS [ME] 
INNER JOIN [Members].[MemberType] AS [MT] ON [ME].[MemberType_Id] = [MT].[Id] 
INNER JOIN [Members].[Status] AS [ST] ON [ME].[Status_Id]=[ST].[Id] 
INNER JOIN 
(
    select 'Manager' MemberType, Member_id, Firstname, LastName, SSN, 
      Address, PostalCode, Gender, City_id 
    from ManagerProfile 
    union all 
    select 'Customer', Member_id, Firstname, LastName, SSN, 
      Address, PostalCode, Gender, City_id 
    from CustomerProfile 
    union all 
    select 'Dealer', Member_id, Firstname, LastName, SSN, 
      '', '', Gender, 0 
    from DealerProfile 
) 
    on me.id = a.member_id 
    and MT.TYPE = a.MemberType

この明確：

SELECT  
[ME].[Id] AS [MemberId], 
[ME].[UserId], 
[ME].[UserName], 
[ME].[Email], 
[ME].[Status_Id], 
[ST].[Title] AS [Status], 
[ME].[MemberType_Id], 
[MT].[Title] AS [MemberType], 

CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[Id] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[Id] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN [MAP].[Id] 
    ELSE 0 END AS [Profile_Id], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[FirstName] 
    WHEN [ME].[MemberType_Id] = (tblTypes.DealerId THEN [DEP].[FirstName] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN [MAP].[FirstName] 
    ELSE 'Unknown' END AS [FirstName], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[LastName] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[LastName] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN [MAP].[LastName] 
    ELSE 'Unknown' END AS [LastName], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[SSN] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[SSN] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN [MAP].[SSN] 
    ELSE 'Unknown' END AS [SSN], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[Address] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[Address] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN '' 
    ELSE 'Unknown' END AS [Address], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[PostalCode] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[PostalCode] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN '' 
    ELSE 'Unknown' END AS [PostalCode], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[Gender] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[Gender] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN [MAP].[Gender] 
    ELSE 'Unknown' END AS [Gender], 
CASE 
    WHEN [ME].[MemberType_Id] = tblTypes.CustomerId THEN [CUP].[City_Id] 
    WHEN [ME].[MemberType_Id] = tblTypes.DealerId THEN [DEP].[City_Id] 
    WHEN [ME].[MemberType_Id] = tblTypes.ManagerId THEN 0 
    ELSE 0 END AS [CityId] 

FROM [Members].[Member] AS [ME] 
INNER JOIN [Members].[MemberType] AS [MT] ON [ME].[MemberType_Id] = [MT].[Id] 
INNER JOIN [Members].[Status] AS [ST] ON [ME].[Status_Id]=[ST].[Id] 
INNER JOIN [Members].[ManagerProfile] AS [MAP] ON [ME].[Id]= [MAP].[Member_Id] 
INNER JOIN [Members].[CustomerProfile] AS [CUP] ON [ME].[Id]=[CUP].[Member_Id] 
INNER JOIN [Members].[DealerProfile] AS [DEP] ON [ME].[Id]=[DEP].[Member_Id] 
CROSS JOIN 
    (
     SELECT 
      CustomerId, 
      DealerId, 
      ManagerId 
     FROM 
      (
       SELECT 1 AS nbr 
      ) AS tblType 
     LEFT JOIN 
      (
       SELECT TOP(1) 
        [TMT].[Id] AS CustomerId 
       FROM 
        [Members].[MemberType] AS [TMT] 
       WHERE 
        [TMT].[Title]='Customer' 
      ) AS Customer ON 1=1 
     LEFT JOIN 
      (
       SELECT TOP(1) 
        [TMT].[Id] AS DealerId 
       FROM 
        [Members].[MemberType] AS [TMT] 
       WHERE 
        [TMT].[Title]='Dealer' 
      ) AS Dealer ON 1=1 
     LEFT JOIN 
      (
       SELECT TOP(1) 
        [TMT].[Id] AS ManagerId 
       FROM 
        [Members].[MemberType] AS [TMT] 
       WHERE 
        [TMT].[Title]='Manager' 
      ) AS Manager ON 1=1 
    ) AS tblTypes

出典

2012-04-12 06:56:54 Arion

1

私はあなたがマネージャー、顧客やディーラーが同じテーブルに物事が簡単になるしていることをふりをした場合、これはあなたに

SELECT  
[ME].[Id] AS [MemberId], 
[ME].[UserId], 
[ME].[UserName], 
[ME].[Email], 
[ME].[Status_Id], 
[ST].[Title] AS [Status], 
[ME].[MemberType_Id], 
[MT].[Title] AS [MemberType], 
[X].[Id] AS [Profile_Id], 
[X].[FirstName], 
[X].[LastName], 
[X].[SSN], 
[X].[Address], 
[X].[PostalCode], 
[X].[Gender], 
[X].[City_Id] 
FROM [Members].[Member] AS [ME] 
INNER JOIN [Members].[MemberType] AS [MT] ON [ME].[MemberType_Id] = [MT].[Id] 
INNER JOIN [Members].[Status] AS [ST] ON [ME].[Status_Id]=[ST].[Id] 
INNER JOIN 
    (Select [Member_Id], [Id], [FirstName], [LastName], [SSN], [Address]='', [PostalCode]='', [Gender], [City_Id]=0, 
     [TYPE] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Customer') 
     From [Members].[ManagerProfile] AS [MAP] Where [MAP].[Member_Id] = [ME].[Id] 
    Union All 
    Select [Member_Id], [Id], [FirstName], [LastName], [SSN], [Address], [PostalCode], [Gender], [City_Id], 
     [TYPE] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Manager') 
    From [Members].[CustomerProfile] AS [CUP] Where [CUP].[Member_Id] = [ME].[Id] 
    Union All 
    Select [Member_Id], [Id], [FirstName], [LastName], [SSN], [Address], [PostalCode], [Gender], [City_Id], 
     [TYPE] = (SELECT TOP(1) [TMT].[Id] FROM [Members].[MemberType] AS [TMT] WHERE [TMT].[Title]='Dealer') 
    From [Members].[DealerProfile] AS [DEP] Where [DEP].[Member_Id] = [ME].[Id]) 
    AS [X] On [ME].[Id] = [X].[Member_Id] AND [ME].[MemberType_Id] = [X].[TYPE] 
GO

出典

2012-04-12 07:28:05

1

に役立つと思いますあなたのすべてのディーラー、マネージャーおよび顧客は、共通のデータの共通テーブルを持つ同一のテーブル、または多分テーブルごとのテーブルに属していることを示唆しています。 MemberTypeIdは、DiscriminatorとしてMembersから新しいテーブルに移動するよりも簡単です。

出典

2012-04-12 08:02:28

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