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SQL How do I concatenate strings from a column into a single row

Posted on 2009-04-10
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Last Modified: 2012-05-06
The  column ProductType.searchtext in this query can have multiple values. I need to join the values together separated by a comma to insure there is always one row of data. I have done this in separate queries but cannot put it all together.
------------ Query One --------------
 
SELECT endshare.orderno, endshare.ship_via, endshare.nvalue, endshare.bill_weigh, endshare.sname, endshare.scompany, endshare.saddr1, endshare.saddr2, endshare.scity, endshare.sstate, endshare.szipcode, endshare.scountry, endshare.sphone1, endshare.semail, endshare.usi_status, endshare.ship_date, endshare.BOX_ID, endshare.ORDERNO, ProductType.searchtext
 
FROM endshare 
 
join items on items.orderno = endshare.orderno
join stock on items.item = stock.number
join ProductType on stock.assoc = ProductType.prodtype
 
WHERE endshare.orderno=318850
 
 
 
------------ Query Two --------------
DECLARE @searchtext VARCHAR(1024) 
 
SELECT 
    @searchtext = COALESCE(@searchtext + ',', '') + searchtext 
FROM 
    ProductType
 
SELECT ProductType = @searchtext

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Question by:ubsmail
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4 Comments
 
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Expert Comment

by:GarthSnyder
ID: 24120663
You will need to use a user-defined function, as you have done. Here is an example of combining the concatenation with other query results. See the second post, by TG.

This feature is built into MySQL in the form of the GROUP_CONCAT() aggregate function, so Googling for GROUP_CONCAT and "MS Sql" brings up a lot of good hits.

I would include exact code for you but I am not actually an MS Sql user and don't have a test database available.
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Accepted Solution

by:
Richard Quadling earned 250 total points
ID: 24121046
http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/SQL-Server-2005/Q_24157447.html

I had a similar question.

Essentially I ended up with code like this ...
CREATE FUNCTION [dbo].[ListContractsForSingleReport](@i_ReportID INT, @s_Separator VARCHAR(MAX) = ',')
RETURNS VARCHAR(MAX)
AS
BEGIN
        DECLARE @s_List VARCHAR(MAX)
        SELECT @s_List = ''
        SELECT @s_List = @s_List + @s_Separator +  CAST(ContractID AS VARCHAR)
        FROM BANDIT.dbo.ContractReports
        WHERE @ i_ReportID  = ReportID 
        RETURN SubString(@s_List, 2, Len(@s_List))
END

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Assisted Solution

by:Chris Luttrell
Chris Luttrell earned 250 total points
ID: 24121168
Use an XML trick like this one from before http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_24310874.html
I believe the code below is correctly applied to your query.
SELECT endshare.orderno, endshare.ship_via, endshare.nvalue, endshare.bill_weigh, endshare.sname, endshare.scompany, endshare.saddr1, endshare.saddr2, endshare.scity, endshare.sstate, endshare.szipcode, endshare.scountry, endshare.sphone1, endshare.semail, endshare.usi_status, endshare.ship_date, endshare.BOX_ID, endshare.ORDERNO, ProductType = REPLACE((SELECT Names AS [data()]
                   FROM ProductType
                   WHERE stock.assoc = ProductType.prodtype
                   FOR XML PATH ('')), ' ', ',')
 FROM endshare 
join items on items.orderno = endshare.orderno
join stock on items.item = stock.number
join ProductType on stock.assoc = ProductType.prodtype
WHERE endshare.orderno=318850

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