Concatenating records in a single column without looping?

Question

I have a table with 1 column of varchar values. I am looking for a way to concatenate those values into a single value without a loop, if possible. If a loop is the most e

Answer 1

try this:

DECLARE @YourTable table (Col1 int)
INSERT INTO @YourTable VALUES (1)
INSERT INTO @YourTable VALUES (2)
INSERT INTO @YourTable VALUES (30)
INSERT INTO @YourTable VALUES (400)
INSERT INTO @YourTable VALUES (12)
INSERT INTO @YourTable VALUES (46454)

SELECT
    STUFF(
             (
                  SELECT
                      ', ' + cast(Col1 as varchar(30))
                      FROM @YourTable
                      WHERE Col1<=400
                      ORDER BY Col1
                      FOR XML PATH('')
             ), 1, 2, ''
         )

OUTPUT:

-------------------
1, 2, 12, 30, 400

(1 row(s) affected)