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Combine columns into One with Delimiter


Combine columns into One with Delimiter

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jamie_collins
jamie_collins
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I have the following:



Create table Table_1
(
[col1] varchar(10) null,
[col2] varchar(10) null,
)

Insert Table_1(col1, col2)
values ('Bill','Smith'),('Bill',null),(null,'Smith')

select rtrim(isnull(col1+'/',''))+rtrim(isnull(col2+'','')) as firsttry from Table_1


This returns:

Bill/Smith
Bill/
Smith

I am trying to remove the trailing '/' if col2 is null from col1.

Was playing around with Reverse but couldn't get it to work...
Any ideas would be appreciated.

Thanks
Luis Cazares
Luis Cazares
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It's not an elegant solution but it works

select isnull(col1,'') + ISNULL( RIGHT( col1 + col2 + '/', 1), '') +rtrim(isnull(col2,'')) as firsttry from Table_1




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?


How to post data/code on a forum to get the best help: Option 1 / Option 2
Luis Cazares
Luis Cazares
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Just another option


select CASE WHEN col1 + col2 IS NULL
      THEN COALESCE( col1, col2, '')
      ELSE col1 + '/' + col2 END as secondtry
from Table_1




Luis C.
General Disclaimer:
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?


How to post data/code on a forum to get the best help: Option 1 / Option 2
Lowell
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my verison is kinda of wordy but works with a case statement:

SELECT
CASE
WHEN RTRIM(ISNULL(col1, '')) <> ''
AND RTRIM(ISNULL(col2, '')) <> ''
THEN RTRIM(ISNULL(col1, ''))
+ '/'
+ RTRIM(ISNULL(col2, ''))
ELSE RTRIM(ISNULL(col1, ''))
+ ''
+ RTRIM(ISNULL(col2, ''))
END AS firsttry
FROM Table_1



Lowell

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Sean Lange
Sean Lange
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Here is another:


select stuff(isnull(col1 + '/', '') + isnull(col2 + '/', ''), LEN(isnull(col1 + '/', '') + isnull(col2 + '/', '')), 1, '')
from Table_1



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Luis Cazares
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Sean Lange (6/6/2013)
Here is another:


select stuff(isnull(col1 + '/', '') + isnull(col2 + '/', ''), LEN(isnull(col1 + '/', '') + isnull(col2 + '/', '')), 1, '')
from Table_1



Sean, you gave me an idea.

select stuff(isnull('/' + col1, '') + isnull('/' + col2, ''), 1, 1, '')
from Table_1




Luis C.
General Disclaimer:
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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Luis Cazares (6/6/2013)
Sean Lange (6/6/2013)
Here is another:


select stuff(isnull(col1 + '/', '') + isnull(col2 + '/', ''), LEN(isnull(col1 + '/', '') + isnull(col2 + '/', '')), 1, '')
from Table_1



Sean, you gave me an idea.

select stuff(isnull('/' + col1, '') + isnull('/' + col2, ''), 1, 1, '')
from Table_1




I like it!!! Turned it around and avoided the whole len check. Great approach.

_______________________________________________________________

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 Moden's 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)
Jeff Moden
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Luis Cazares (6/6/2013)
Sean Lange (6/6/2013)
Here is another:


select stuff(isnull(col1 + '/', '') + isnull(col2 + '/', ''), LEN(isnull(col1 + '/', '') + isnull(col2 + '/', '')), 1, '')
from Table_1



Sean, you gave me an idea.

select stuff(isnull('/' + col1, '') + isnull('/' + col2, ''), 1, 1, '')
from Table_1




No wonder my post count is so low lately. Between you, Sean, and some of the other heavy hitters, I don't have much to do anymore. Well done!

If you're guaranteed to have only 2 columns, a slight variation on the COALESCE approach would work. Haven't checked it for performance, but it might be a little faster because it only does 2 concatenations instead of 3.

 SELECT COALESCE(Col1+'/'+Col2,Col1,Col2)




--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
     Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Luis Cazares
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Jeff Moden (6/6/2013)
Luis Cazares (6/6/2013)
Sean Lange (6/6/2013)
Here is another:


select stuff(isnull(col1 + '/', '') + isnull(col2 + '/', ''), LEN(isnull(col1 + '/', '') + isnull(col2 + '/', '')), 1, '')
from Table_1



Sean, you gave me an idea.

select stuff(isnull('/' + col1, '') + isnull('/' + col2, ''), 1, 1, '')
from Table_1




No wonder my post count is so low lately. Between you, Sean, and some of the other heavy hitters, I don't have much to do anymore. Well done!

If you're guaranteed to have only 2 columns, a slight variation on the COALESCE approach would work. Haven't checked it for performance, but it might be a little faster because it only does 2 concatenations instead of 3.

 SELECT COALESCE(Col1+'/'+Col2,Col1,Col2)




How come neither of us got that simple and effective solution? I need to go back to practice the KISS mantra.


Luis C.
General Disclaimer:
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?


How to post data/code on a forum to get the best help: Option 1 / Option 2
Jeff Moden
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Luis Cazares (6/6/2013)
How come neither of us got that simple and effective solution? I need to go back to practice the KISS mantra.


BWAAA-HAAA!!! I have null idea of what you're talking about. :-D

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
     Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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