known mainid matches are not displaying in result set - MS SQL 2005

I have two tables that I had to generate IDs on.  I have reiewed the result sets from each table and see matches but when I run a query to list the matches, I'm getting 0 results...any ideas?

Here's the code.....thx

drop table #temp2
select center, bld, (ltrim(rtrim (Center))+''+ltrim(rtrim (Bld))) as mainid
into #temp2
from dbo.temp1

drop table #temp3
select lu.center_desc as Center, f.building_nos, b.Building,
(ltrim(rtrim (lu.center_desc))+''+ ltrim(rtrim(b.building))) as mainid
into #temp3
from tbl_facility f join LU_Center_Site lu on f.centerid = lu.centerid
join dbo.tbl_Buildings b on b.facilityid = f.facilityid

delete from #temp2 where mainid is null
delete from #temp3 where mainid is null

select mainid from #temp2 where mainid in (select mainid from #temp3)
Glen_DAsked:
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dwe761Connect With a Mentor Software EngineerCommented:
Also, try using regular tables rather than temp tables and after your code runs, generate the script on the two tables to see if they are coming out with the exact same data types on the fields being joined.
I tried your script on a single table where the inputs are the same and it works.  That leads me to believe that after you have concatinated different fields from different tables having possibly different data types, that although the new fields look similar, they may not be the same to SQL Server.
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Glen_DAuthor Commented:
here's a known example that matches:

MSFC4570 - from #temp2
MSFC4570 - from #temp3

Thx
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dwe761Software EngineerCommented:
As a test, try just selecting the ID directly from the table:
Select * FROm #temp2 where mainid = 'MSFC4570'
Select * FROm #temp3 where mainid = 'MSFC4570'
 
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Glen_DAuthor Commented:
That works but I figured out a work around...I concatenated the fields in Excel and then reimported the data...worked after that.  I don't understand if I trim all spaces in MS SQL, the formats for each field were the same, why I couldn't pull the matches.  No NULLS were in either table as well....

Thx for your help though
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dwe761Software EngineerCommented:
You could also force the data type on the numeric part of the ID before concatinating it because that is probably what Excel implicitly did for you.  See below.
 
 

drop table #temp2
select center, bld, (ltrim(rtrim (Center))+''+ltrim(rtrim (CONVERT(nvarchar(10),Bld)))) as mainid
into #temp2
from dbo.temp1
 
drop table #temp3
select lu.center_desc as Center, f.building_nos, b.Building,
(ltrim(rtrim (lu.center_desc))+''+ ltrim(rtrim(CONVERT(nvarchar(10),b.building)))) as mainid
into #temp3
from tbl_facility f join LU_Center_Site lu on f.centerid = lu.centerid
join dbo.tbl_Buildings b on b.facilityid = f.facilityid
 
delete from #temp2 where mainid is null
delete from #temp3 where mainid is null
 
select mainid from #temp2 where mainid in (select mainid from #temp3) 

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Glen_DAuthor Commented:
Thx...I tried convert and cast and just to be sure, I ran your query and I had the same 0 result...I'll keep the ideas for future reference though...G
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