Concatenate column values as single value SQL Server 2008

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Concatenate column values as single value SQL Server 2008

Trainee SQL

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Points: 666
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November 25, 2013 at 11:40 pm

#286587

have a table with a column:
|-------------|
| ColumnName |
|------------- |
| Value One |
| Value Two |
| Value Three |
| Value Four |
| Value Five |
|-------------|
I will declare a variable,
DECLARE @ColumnNameList VARCHAR(MAX)
and I need the below value(concatenated) in my variable
'Value One,Value Two,Value Three,Value Four,Value Five'
Can anyone help me out in doing this?
Thanks in advance.

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pietlinden SSC Guru Points: 63503 More actions · Answer 1

https://www.simple-talk.com/sql/t-sql-programming/concatenating-row-values-in-transact-sql/

Happy reading!

Sean Lange SSC Guru Points: 286590 More actions · Answer 2

It looks like you are trying to create a comma separated list of values? Check out this article. http://www.sqlservercentral.com/articles/71700/[/url]

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bob 26661 SSC Journeyman Points: 77 More actions · Answer 3

You are trying to concatenate rows in a column, not columns. there is a difference

$t@r SSCommitted Points: 1751 More actions · Answer 4

Try this

declare @ColumnNameList VARCHAR(MAX)

SELECT @ColumnNameList = COALESCE(@ColumnNameList +',' ,'') + ColumnName

FROM

<<table name>>

select @ColumnNameList

kapil_kk SSC-Insane Points: 21316 More actions · Answer 5

$w@t (11/27/2013)
Try this
declare @ColumnNameList VARCHAR(MAX)
SELECT @ColumnNameList = COALESCE(@ColumnNameList +',' ,'') + ColumnName
FROM
<<table name>>
select @ColumnNameList

+1 🙂

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Dwain Camps SSC Guru Points: 86948 More actions · Answer 6

$w@t (11/27/2013)
Try this
declare @ColumnNameList VARCHAR(MAX)
SELECT @ColumnNameList = COALESCE(@ColumnNameList +',' ,'') + ColumnName
FROM
<<table name>>
select @ColumnNameList

While this works for the specific case described by the OP, indexing on the table might impact the order the rows are concatenated in. I suggest you take a look at the link provided by Sean to Wayne Sheffield's article for a much more generally useful solution.

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