SQL重複値のないローのフィルタリング

Question

こんにちは、私はSQLを初めて使い、特定の列の値が重複していない行しか取得できない方法を見つけようとしています。表。

ID|Branch ID 
1  444 
2  333 
3  444 
4  111 
5  555 
6  333 

私が望む結果はそうだけ

編集を非重複行を

ID|Branch ID 
4  111 
5  555 

を示すされます：私はしたい以下の表は、T1と呼ばれ、含まれているたとえば

これを大きなリレーショナルコードに適用します。私は重複したID値を含む列と呼ばれるBRANCH_IDを持つことになります

FROM dbo.LogicalLine 
      INNER JOIN dbo.Page ON dbo.LogicalLine.page_id = dbo.Page.id 
      INNER JOIN dbo.Branch ON dbo.LogicalLine.branch_id = dbo.Branch.id 

テーブルLogicalLine

を追加したいのはここの抜粋です。上の例のような重複していないbranch_idのみを表示し、ブランチテーブルをINNER JOINしてLogicalLineにフィルタリングしたいと思います。ここ

追加-Fullコード：

SELECT 

(SELECT name 
FROM ParentDevice 
WHERE (Dev1.type NOT LIKE '%cable%') AND (id = Dev1.parent_device_id))T1_DeviceID, 

(SELECT name 
FROM Symbol 
WHERE (id = CP1.symbol_id) AND (type NOT LIKE '%cable%'))T1_DeviceName, 

(SELECT name 
FROM Location 
WHERE (id = Page.location_id))T1_Location, 

(SELECT name 
FROM Installation 
WHERE (id = Page.installation_id))T1_Installation, 

(SELECT name 
FROM ParentDevice 
WHERE (Dev2.type NOT LIKE '%cable%') AND (id = Dev2.parent_device_id))T2_DeviceID, 

(SELECT name 
FROM Symbol 
WHERE (id = CP2.symbol_id) AND (type NOT LIKE '%cable%'))T2_DeviceName, 

(SELECT name 
FROM Location 
WHERE (id = PD2.location_id))T2_Location, 

(SELECT name 
FROM Installation 
WHERE (id = Page.installation_id))T2_Installation, 

(SELECT devicefamily 
FROM Device 
WHERE (type LIKE '%cable%') AND (id = SymCable.device_id))CablePartNumber, 

(SELECT name 
FROM ParentDevice 
WHERE (id = DevCable.parent_device_id) AND (DevCable.type LIKE '%cable%'))CableTag 

FROM dbo.LogicalLine 
      INNER JOIN dbo.Page ON dbo.LogicalLine.page_id = dbo.Page.id 
      INNER JOIN dbo.Branch ON dbo.LogicalLine.branch_id = dbo.Branch.id 
      LEFT OUTER JOIN dbo.Symbol AS SymCable ON dbo.LogicalLine.cable_id = SymCable.id 
      LEFT OUTER JOIN dbo.Device AS DevCable ON SymCable.device_id = DevCable.id 
      LEFT OUTER JOIN dbo.ParentDevice AS ParentCable ON DevCable.parent_device_id = ParentCable.id 
      INNER JOIN dbo.SymbolCP AS CP1 ON dbo.Branch.cp1_id = CP1.id 
      INNER JOIN dbo.SymbolCP AS CP2 ON dbo.Branch.cp2_id = CP2.id 
      INNER JOIN dbo.Symbol AS S1 ON CP1.symbol_id = S1.id 
      INNER JOIN dbo.Symbol AS S2 ON CP2.symbol_id = S2.id 
      INNER JOIN dbo.Device AS Dev1 ON S1.device_id = Dev1.id 
      INNER JOIN dbo.Device AS Dev2 ON S2.device_id = Dev2.id 
      INNER JOIN dbo.ParentDevice AS PD1 ON Dev1.parent_device_id = PD1.id 
      INNER JOIN dbo.ParentDevice AS PD2 ON Dev2.parent_device_id = PD2.id 
      INNER JOIN dbo.Location AS L1 ON PD1.location_id = L1.id 
      INNER JOIN dbo.Location AS L2 ON PD2.location_id = L2.id 
      INNER JOIN dbo.Installation AS I1 ON L1.installation_id = I1.id 
      INNER JOIN dbo.Installation AS I2 ON L2.installation_id = I2.id 

WHERE 
     (PD1.project_id = @Projectid) AND (dbo.LogicalLine.drawingmode LIKE '%Single Line%'); 

Answer 1

Select Id, BranchId from table t 
Where not exists 
    (Select * from table 
    where id != t.Id 
     and BranchId = t.BranchId) 

または

Select Id, BranchId 
From table 
Group By BranchId 
Having count(*) == 1 

EDITは：

Select l.Id BranchId, [plus whatever else you have in your select clause] 
FROM LogicalLine l 
     join Page p ON p.id = l.page_Id 
     join Branch b ON b.Id = l.branch_id 
Group By l.branch_id, [Plus whatever else you have in Select clause] 
Having count(*) == 1 

：要求されたとして、単にあなたの完全なSQLクエリに Where句を追加、変更するには

または

Select l.Id BranchId, [plus whatever else you have in your select clause] 
FROM LogicalLine l 
     join Page p on p.id = l.page_Id 
     join Branch b on b.Id = l.branch_id 
Where not exists 
    (Select * from LogicalLine 
    where id != l.Id 
     and branch_id = l.branch_id)