Question

Using SQL Server 10.0 and 10.5

I’m trying to fetch multiple rows into one row and comma seperate them in a SELECT statement

If I do this:

SELECT STUFF(CAST(rating AS VARCHAR),1,0,',')
FROM product_reviews
WHERE product_id = 8995
FOR XML PATH('')

I get the desired result except for the leading comma.

So I change the first line to attempt to remove the leading comma like so:

SELECT SUBSTRING(STUFF(CAST(rating AS VARCHAR),1,0,','),2,999)
FROM product_reviews
WHERE product_id = 8995
FOR XML PATH('')

This removes all the commas.

Next I try this:

SELECT SUBSTRING(ratings,2,999)
FROM (SELECT STUFF(CAST(rating AS VARCHAR),1,0,',') AS ratings
      FROM product_reviews
      WHERE product_id = 8995
      FOR XML PATH('')) tmp

But that just gives me the error:

Msg 8155, Level 16, State 2, Line 5
No column name was specified for column 1 of 'tmp'.
Msg 207, Level 16, State 1, Line 1
Invalid column name 'ratings'.

I have used other names for column 1 with same error

I know I can create a procedure to do this, but that’s not what I need here.

Any help appreciated.

Thank you

Answer 1

How about

SELECT STUFF(
(
    SELECT
        ',',
        CAST(rating AS VARCHAR)
    FROM product_reviews
    WHERE product_id = 8995
    FOR XML PATH('')
), 1, 1, '')