將表值作爲GROUP BY中的逗號分隔列表返回

Question

我希望從表（SQL Server 2012）中選擇數據 - 將一個字段分組，並將該組中的所有副本作爲逗號分隔列表返回。

到目前爲止，我所見過的所有解決方案都不允許使用一個組，併爲整個表格返回一個單獨的逗號分隔列表作爲變量，這對我不起作用。

我需要什麼SQL？

這是我擁有的數據：

BankingSlipID CashSheetSessionID BankingSlipNumber 
1    10     abcabc 
2    10     xyzxyz 
3    10     123465789 
4    11     9999999 
5    11     55555 
6    12     88888 

這就是我想：

CashSheetSessionID BankingSlipNumber 
10     abcabc, xyzxyz, 123465789 
11     9999999, 55555 
12     88888 

SQL創建源表（數據）：

CREATE TABLE [dbo].[BankingSlips](
[BankingSlipID] [int] IDENTITY(1,1) NOT NULL, 
[CashSheetSessionID] [int] NOT NULL, 
[BankingSlipNumber] [varchar](50) NOT NULL 
) ON [PRIMARY] 
GO 
SET IDENTITY_INSERT [dbo].[BankingSlips] ON 
GO 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (1, 10, N'abcabc') 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (2, 10, N'xyzxyz') 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (3, 10, N'123465789') 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (4, 11, N'9999999') 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (5, 11, N'55555') 
INSERT [dbo].[BankingSlips] ([BankingSlipID], [CashSheetSessionID], [BankingSlipNumber]) VALUES (6, 12, N'88888') 
SET IDENTITY_INSERT [dbo].[BankingSlips] OFF 
GO 

我需要寫什麼SQL來獲取？

Answer 1

使用STUFF

SELECT CashSheetSessionID, BankingSlipNumber = 
    STUFF((SELECT ', ' + BankingSlipNumber 
      FROM BankingSlips b 
      WHERE b.CashSheetSessionID = a.CashSheetSessionID 
      FOR XML PATH('')), 1, 2, '') 
FROM BankingSlips a 
GROUP BY CashSheetSessionID 

輸出：

CashSheetSessionID BankingSlipNumber 
10     abcabc, xyzxyz, 123465789 
11     9999999, 55555 
12     88888 

SQL小提琴：http://sqlfiddle.com/#!3/1d728b/4/0