は、私はこのようなテーブルを持っているSQL

Question

を使用してデータローをマージマージされた操作の[sam]を合計します。

私はこれを試してみましたが、エラー

SELECT [operation_type], 
     [operation_name], 
     [machine_type], 
     [attachment], 
     Stuff((SELECT '+' + t2.operation_name 
      FROM ob 
      WHERE [operation_type] = t2.[operation_type] 
       AND [machine_type] = t2.[machine_type] 
       AND [attachment] = t2.[attachment] 
      FOR xml path ('')), 1, 1, '') AS NAME 
FROM ob AS t2 
GROUP BY operation_type 

Answer 1

SELECT 
    operation_type, 
    STUFF((SELECT '+' + ob.operation_name 
      FROM ob 
      WHERE 
       operation_type = t2.operation_type 
       AND machine_type = t2.machine_type 
       AND attachment = t2.attachment 
      FOR XML PATH ('')), 1, 1, '') AS 'Operation_Name' , 
    machine_type, 
    attachment, 
    SUM(SAM) AS 'SAM' 
FROM 
    ob AS t2 
GROUP BY 
    t2.operation_type, t2.machine_type, t2.attachment 

はありがとう取得！