Multiple Rows to single column using SQL Server

Question

I want to convert my found data to a single column

My data is

Id
------
3
4
5

that record I want to this format

id
=======
3,4,5

Answer 1

Try,

 SELECT STUFF( (SELECT ',' + Id
                                 FROM My_Table
                                 ORDER BY Id
                                 FOR XML PATH('')), 
                                1, 1, '')

Original_Post_Here

Answer 2

Another way

DECLARE @str VARCHAR(1000)

SELECT @str = coalesce(@str + ',', '') + a.[Your Column]
FROM (
    SELECT DISTINCT [Your Column]
    FROM [your Table]
    ) a

SELECT @str