Problem in printing contents of a query in a dynamic sql query

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Problem in printing contents of a query in a dynamic sql query

gamaz

Valued Member

Points: 59
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June 25, 2010 at 10:04 am

#220534

Hi,
I am trying to figure out a dynamic sql query content.
The code is as follows:
DECLARE @cols NVARCHAR(2000)
DECLARE @query NVARCHAR(4000)
SET @query = N'SELECT tID, '+
@cols +'
FROM
(SELECT t2.tID
, t1.ColName
, t2.Txt
FROM Table1 AS t1
JOIN Table2 AS t2 ON t1.ColId = t2.ColID) p
PIVOT
(
MAX([Txt])
FOR ColName IN
( '+
@cols +' )
) AS pvt
ORDER BY tID;'
PRINT @query
I need to know the contents of @query before executing the @query.
However the PRINT does not give me anything.
I would appreciate any help on this. Thanks.

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John Rowan SSC Guru Points: 56440 More actions · Answer 1

SELECT @query

John Rowan

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Dan.Humphries SSChampion Points: 12125 More actions · Answer 2

Try select @query

print @query depending on how you are running this would only show up in the message line. It is possible it is working but you do not see it.

Dan

If only I could snap my figures and have all the correct indexes apear and the buffer clean and.... Start day dream here.

Eugene Elutin SSC Guru Points: 59322 More actions · Answer 3

Value of @cols variable is NULL. It means that your @query will be NULL also. So, nothing to print!

Changing "PRINT @query" to "SELECT @query" will confirm the above - you will see the NULL value returned to you!

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gamaz Valued Member Points: 59 More actions · Answer 4

Thanks everyone for the help. I appreciate it. Eugene thanks for pointing the @col showing null. I forgot to include the select query containing the @col. Once I put the select query it worked great.