Converting SQL Server Top N to Oracle Equivalent

Hi,

Gota SS2K5 query that I'm trying to convert over to Oracle 10gR2.

This is the SS2K5 query:

select top 1 ALG.time_stamp
from ALG, CHG 
where ALG.change_id = CHG.id 
and (type = 'CL' or type = 'RE') 
order by ALG.time_stamp ASC

I coded the Oracle 10gR2 equivalent as follows:

select b.time_stamp
from (
select alg.time_stamp
from ALG, CHG
where ALG.change_id = CHG.id
and (type = 'CL' or type = 'RE')
order by ALG.time_stamp asc) b
where rownum <= 1
order by rownum asc
/

Is this the correct way to do it?  I wish I could check the results between the SS2K5 db and the Oracle db but I don't have access to the SS db and even if I did, the data sets are very different.

Anyway, just wanted to know if I was on the right track or am I totally off-base here.

tia

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mohammed       

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http://www.freelists.org/webpage/oracle-l Received on Wed Oct 22 2008 - 20:56:43 CDT