Dynamically assigning a value using the "Top N" Clause

I've developed a proc that takes an input parameter @.TopN Int. I want to
use it to dynamically pull the top n records from my DB as
such
Select TOP @.TopN UserID, Metric1, Metrics2...
Order By Metric1
I can only get this to work if I use an integer constant.
i.e. Select TOP 10 UserID
I Can't get it to work with the variable I'm passing in
Anyone know how to do this easily?
Thanks in advance
Message posted via http://www.webservertalk.comYou can use SET ROWCOUNT instead, but make sure that your ORDER BY
clause includes a key that is unique in the result set because SET
ROWCOUNT has no equivalent of the TOP WITH TIES option. Unless the
ORDER BY criteria is unique you may get unpredictable results.
David Portas
SQL Server MVP
--|||See:
http://groups.google.ca/groups?selm...FTNGP10.phx.gbl
Anith|||T Harris via webservertalk.com wrote:
> I've developed a proc that takes an input parameter @.TopN Int. I want
> to use it to dynamically pull the top n records from my DB as
> such
> Select TOP @.TopN UserID, Metric1, Metrics2...
> Order By Metric1
> I can only get this to work if I use an integer constant.
> i.e. Select TOP 10 UserID
> I Can't get it to work with the variable I'm passing in
> Anyone know how to do this easily?
> Thanks in advance
You'll need to wait for SQL 2005 for that.
David Gugick
Imceda Software
www.imceda.com|||Thanks, everyone for the responses.
Since the subset of data that I'm querying for is dynamic itself (i.e. I
don't know what the topN data set will be until after the order by is
applied) I can't directly apply the set rowcount. So the only way I can get
it to work it to query the dataset and then use the set rowcount against
the already ordered data set. This adds some overhead but it does work.
Tharrris
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