如何将多行组合到SQL Server中以逗号分隔的列表中？ [重复]

Possible Duplicate:
SQL Server: Can I Comma Delimit Multiple Rows Into One Column?

可能重复:SQL Server:我可以逗号将多行划分为一列吗?

I have Table X(X_ID, X_Name) is 1-M with Table Y(Y_ID, Y_Value)

我有表X(X_ID,X_Name)是1-M与表Y(Y_ID,Y_Value)

Table X:

X_ID    X_Name
----    ------
12      foo
14      foo2
16      foo3

Table Y:

X_ID    Y_Value
----    -------
12      A
12      B
14      C
14      D
14      E
16      F
16      G

How to get the following result using T-Sql ?

如何使用T-Sql获得以下结果?

X_ID   X_Name   Y_Value
----   ------   ------
12     foo      A,B
14     foo2     C,D,E
16     foo3     F,G

Thanks

1 个解决方案

#1

SELECT X.X_ID, X.X_Name, Y_Value = STUFF((SELECT ',' + Y_Value FROM dbo.Y
  WHERE Y.X_ID = X.X_ID
  FOR XML PATH(''), TYPE).value('.', 'nvarchar(max)'), 1, 1, '')
  FROM dbo.X;