Concatenated String Of Comma Separated Values (was Help With Query)

I have following 2 queries which return different results.


declare @accountIdListTemp varchar(max)
SELECT COALESCE(@accountIdListTemp + ',','') + CONVERT(VARCHAR(10),acct_id)
FROM (SELECT Distinct acct_id
FROM SomeTable) Result
print @accountIdListTemp



The above query return the values without concatenating it.


declare @pot_commaSeperatedList varchar(max)

SELECT DISTINCT acct_id
into #accountIdListTemp
FROM SomeTable


SELECT @pot_commaSeperatedList = COALESCE(@pot_commaSeperatedList + ',','') + CONVERT(VARCHAR(100),acct_id)
FROM #accountIdListTemp
print @pot_commaSeperatedList
drop table #accountIdListTemp



This query returns result as concatenated string of comma separated values.

If i want to get similar result in a single query how can i get it?