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Need help with T-SQL to combine email addresses


Need help with T-SQL to combine email addresses

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pbyrum
pbyrum
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Hello,

I am trying to get email addresses in column and concatenate them into a long string, separated by semi-column ";". So, the results would be like:

bob@company.com; mary@company.org;paul@company.com;susan@company.net

I have this T-SQL below and I am using a while loop that does not work, but I am wondering if I a cursor would work better. I am not sure, as what is below is not working. Can you help me with this query to get the results?

declare @emails as varchar(5000)
while exists (select People.cEmail from dbo.People)
begin
set @emails = cEmail + ';' + @emails
end

Thanks.
Luis Cazares
Luis Cazares
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There's no need for a cursor or a while loop. Check the following article to solve your problem.
http://www.sqlservercentral.com/articles/comma+separated+list/71700/


Luis C.
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Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?


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Sean Lange
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If you don't need any grouping and just simply want all emails from that table into a single column you can do that like this.


select People.cEmail
from dbo.People
for xml path('')



If however, you need other columns from that table or some other information the article that Luis pointed you to is an excellent start.

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Alan.B
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You don't need a loop to do what you were trying to do. This would do the trick


DECLARE @emails varchar(5000)=''

SELECT @emails=@emails+';'+cEmail
FROM dbo.people;



This technique, however, can give you data issues... The prefered method would be to use FOR XML PATH as discussed in the link Louis provided....


SELECT x FROM
( SELECT cEmail + ';'
FROM #people
FOR XML PATH('')) xx(x)



-- Alan Burstein



Best practices for getting help on SQLServerCentral
Need to split a string? Try DelimitedSplit8K or DelimitedSplit8K_LEAD (SQL 2012+)
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Sean Lange
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heh I forgot the semicolon in my post. Alan you don't need to do this with a subselect, just a simple query works.


SELECT cEmail + ';'
FROM #people
FOR XML PATH('')



_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Modens splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
Alan.B
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Sean Lange (8/2/2013)
heh I forgot the semicolon in my post. Alan you don't need to do this with a subselect, just a simple query works.


SELECT cEmail + ';'
FROM #people
FOR XML PATH('')



Thanks.

-- Alan Burstein



Best practices for getting help on SQLServerCentral
Need to split a string? Try DelimitedSplit8K or DelimitedSplit8K_LEAD (SQL 2012+)
Need a pattern-based splitter? Try PatternSplitCM
Need to remove or replace those unwanted characters? Try PatExclude8K and PatReplace8K.

"I can't stress enough the importance of switching from a 'sequential files' mindset to 'set-based' thinking. After you make the switch, you can spend your time tuning and optimizing your queries instead of maintaining lengthy, poor-performing code. " -- Itzek Ben-Gan 2001
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