Concatenation of strings with condition check,,,

Question

Concatenation of strings with condition check,,,

Minnu

SSCertifiable

Points: 6451
More actions
December 3, 2012 at 4:40 am

#393721

hi Team,
Need your help.............
My table contains below columns with values.
ColAColBColCColD
-----------------------------
AdminNULLNULLNULL
Market101256258
Sales205125NULL
Admin256258548
and i want output like below...
ColA:Admin,
ColA:Market, ColB:101 ColC:256 ColD:258
ColA:Sales : ColB:205 ColC:125
ColA:Admin : ColB:256 ColC:258 ColD:548
Trying with below login....but not getting exact query...
SELECT @query1 =
IF EXISTS (SELECT 1 from Table where colA ='Admin')
BEGIN
select 'ColA : ' + rtrim(ColA) + '
need your help plz...

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Jeff Moden SSC Guru Points: 1003853 More actions · Answer 1

You could use either CASE or ISNULL or COALESCE for such a thing. I used ISNULL in the following example. Also, you would do better for yourself if you provided your data as readily consumable data so people can test their answer before posting it. See the first link in my signature below for an article on how to do that correctly.

SELECT RTRIM(

+ 'ColA:'+ISNULL(ColA,'')+', '

+ ISNULL('ColB:'+CAST(ColB AS VARCHAR(10))+' ','')

+ ISNULL('ColC:'+CAST(ColC AS VARCHAR(10))+' ','')

+ ISNULL('ColD:'+CAST(ColD AS VARCHAR(10))+' ','')

)

FROM

( --=== Similation of your table. Use your table name here

SELECT 'Admin',NULL,NULL,NULL UNION ALL

SELECT 'Market',101,256,258 UNION ALL

SELECT 'Sales',205,125,NULL UNION ALL

SELECT 'Admin',256,258,548

)d(ColA,ColB,ColC,ColD)

;

--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.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

Minnu SSCertifiable Points: 6451 More actions · Answer 2

Hi thank U Very Much,

But small change..

If column B is NULL then ColC should not append to the string.

Please.....

Minnu SSCertifiable Points: 6451 More actions · Answer 3

Hi Team,

BEGIN

SELECT RTRIM(

+ISNULL(Col_Name,'')+' : '

+ISNULL(+CAST(ColB AS VARCHAR(10))+' ','')

+ISNULL(' ColC :'+CAST(ColC AS VARCHAR(10))+' ','')

) FROM table_name

END

--

if ColB is NULL then ColC should not append .

Please help....

Sean Lange SSC Guru Points: 286573 More actions · Answer 4

Minnu (12/3/2012)
Hi Team,
BEGIN
SELECT RTRIM(
+ISNULL(Col_Name,'')+' : '
+ISNULL(+CAST(ColB AS VARCHAR(10))+' ','')
+ISNULL(' ColC :'+CAST(ColC AS VARCHAR(10))+' ','')
) FROM table_name
END
--
if ColB is NULL then ColC should not append .
Please help....

If I understand you correctly you just need to add a case in here. (note I also added some spacing so it is more legible)

SELECT RTRIM(

+ ISNULL(Col_Name, '') + ' : '

+ ISNULL(CAST(ColB AS VARCHAR(10)) + ' ', '')

+ case when ColB IS NULL then NULL else ISNULL(' ColC :' + CAST(ColC AS VARCHAR(10)) + ' ', '') end

) FROM table_name

_______________________________________________________________

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Need to split a string? Try Jeff Modens splitter http://www.sqlservercentral.com/articles/Tally+Table/72993/.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns - http://www.sqlservercentral.com/articles/T-SQL/63681/
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs - http://www.sqlservercentral.com/articles/Crosstab/65048/
Understanding and Using APPLY (Part 1) - http://www.sqlservercentral.com/articles/APPLY/69953/
Understanding and Using APPLY (Part 2) - http://www.sqlservercentral.com/articles/APPLY/69954/