將多張發票組合在一起

Question

一次付款可以有多張發票，因此查詢表或結果集可能會返回多行。

我該如何解決這個問題？

Customer Name Payment no Invoice No 
------------- ---------- ----------  
Dave A   1   10 
Dave T   2   10 
Dave T   2   12 

所以我想：

Customer Name Payment no Invoice No 
------------- ---------- ----------  
Dave A   1   10 
Dave T   2   10, 12 

Answer 1

SELECT 
    [Customer Name], [Payment no], 
    STUFF(
     (SELECT ',' + CAST([Invoice No] AS VARCHAR(10)) 
      FROM TableName 
      WHERE [Customer Name] = a.[Customer Name] AND 
       [Payment no] = A.[Payment no] 
      FOR XML PATH ('')) 
      , 1, 1, '') AS InvoiceList 
FROM TableName AS a 
GROUP BY [Customer Name], [Payment no] 

• SQLFiddle Demo