多行到一个以逗号分隔的值

Question

我想在SQL Server中创建一个表值函数,我想以逗号分隔值返回数据.

例如表格: tbl

ID | Value
---+-------
 1 | 100
 1 | 200
 1 | 300     
 1 | 400 

现在,当我使用该函数执行查询时 Func1(value)

SELECT Func1(Value) 
FROM tbl 
WHERE ID = 1

我想要的输出是: 100,200,300,400

Answer 1

测试数据

DECLARE @Table1 TABLE(ID INT, Value INT)
INSERT INTO @Table1 VALUES (1,100),(1,200),(1,300),(1,400)

询问

SELECT  ID
       ,STUFF((SELECT ', ' + CAST(Value AS VARCHAR(10)) [text()]
         FROM @Table1 
         WHERE ID = t.ID
         FOR XML PATH(''), TYPE)
        .value('.','NVARCHAR(MAX)'),1,2,' ') List_Output
FROM @Table1 t
GROUP BY ID

结果集

????????????????????????????
? ID ?     List_Output     ?
????????????????????????????
?  1 ?  100, 200, 300, 400 ?
????????????????????????????