Question

I have a table variable in a stored procedure. What I want is to find all of the unique values in one column and join them in a comma-separated list. I am already in a stored procedure, so I can do it some way that way; however, I am curious if I can do this with a query. I am on SQL Server 2008. This query gets me the values I want:

SELECT DISTINCT faultType FROM @simFaults;

Is there a way (using CONCAT or something like that) where I can get the list as a single comma-separated value?

Answer 1

This worked for me on a test dataset.

DECLARE @MyCSV Varchar(200) = ''

SELECT @MyCSV = @MyCSV +
CAST(faulttype AS Varchar) + ','
FROM @Simfaults
GROUP BY faultType

SET @MyCSV = LEFT(@MyCSV, LEN(@MyCSV) - 1)

SELECT @MyCSV

The last part is needed to trim the trailing comma.