Top Clause , Union And Order By

Dec 7, 2007

Hi,

I'm currently have a problem with a query using a top clause. When I run it by itself as a single query, I have no problems and the results are valid. However, if I try duplicate the query after a union clause, the order by ... desc doesn't order properly.

The following is the query I'm using along with the results. Then I'll have the query I was trying to unite and the results (date ranges selected were the same in both):

QUERY 1

select top 1 (s.ldate), v.mdtid, po.odometer, pi.odometer, (pi.odometer-po.odometer) as 'Total Miles'

from EventStrings ES

JOIN schedules s
ON ES.SchId=S.SchId
JOIN vehicles v
ON v.vehicleid=es.vehicleid
JOIN Events PO
ON PO.schid=es.schid
AND PO.EvStrId=ES.EvStrId
AND po.activity=4
JOIN Events PI
ON PI.schid=es.schid
AND PI.EvStrId=ES.EvStrId
AND pi.activity=3

WHERE es.providerid in (0,1,4)
and s.ldate>=?
and s.ldate<=?
and v.mdtid=20411

order by s.ldate desc


RESULTS 1

DATE MDT IDPU Odometer DO Odometer Total Miles
12/6/2007 2041112810.6 12874.5 63.9

QUERY 2 (with Union)

select top 1 (s.ldate), v.mdtid, po.odometer, pi.odometer, (pi.odometer-po.odometer) as 'Total Miles'

from EventStrings ES

JOIN schedules s
ON ES.SchId=S.SchId
JOIN vehicles v
ON v.vehicleid=es.vehicleid
JOIN Events PO
ON PO.schid=es.schid
AND PO.EvStrId=ES.EvStrId
AND po.activity=4
JOIN Events PI
ON PI.schid=es.schid
AND PI.EvStrId=ES.EvStrId
AND pi.activity=3

WHERE es.providerid in (0,1,4)
and s.ldate>=[From Date,Date]
and s.ldate<=[To Date,Date]
and v.mdtid=20411

Union

select top 1 (s.ldate), v.mdtid, po.odometer, pi.odometer, (pi.odometer-po.odometer) as 'Total Miles'

from EventStrings ES

JOIN schedules s
ON ES.SchId=S.SchId
JOIN vehicles v
ON v.vehicleid=es.vehicleid
JOIN Events PO
ON PO.schid=es.schid
AND PO.EvStrId=ES.EvStrId
AND po.activity=4
JOIN Events PI
ON PI.schid=es.schid
AND PI.EvStrId=ES.EvStrId
AND pi.activity=3

WHERE es.providerid in (0,1,4)
and s.ldate>=?
and s.ldate<=?
and v.mdtid=2642

order by s.ldate desc

RESULTS 2

DATE MDT ID PU OdometerDO Odometer Total Miles
4/10/2007 20411 1207.21252.5 45.3
1/2/2007 2642 193652.6193817 164.4

As you can see, the results are sorted very differently. Is there any way to have the order by apply to both queries?

Thanks!
Craig

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I need to run two select statment on the same tabel and i Use Union to join the result comes from the first table with the one comes from the second one. but one i use order by union dose not work.

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Oct 25, 2007

Hi!

I'm trying to get the results from three different tables, where they have some of the same results. I'm only interested in where they match and then trying to order by date (that's in three columns - M, D, Y). I read previous post in 9/07 but the result doesn't seem to order correctly. It does not have any rhyme or reason to the outputed results as it bounces back and forth through Oct, Nov and Dec posting and throughout all three tables. Here's my query below. Any ideas how I can get my ordering correct for all three tables to display all Oct, all Nov and all Dec?

Thanks so much

select date3, date2, date1, who, what
from
(
select date3, date2, date1, who, what from shows
union
select date3, date2, date1, who, what from shares
union
select date3, date2, date1, who, what from soiree
)
a order by date3, date2, date1

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Thanks,

Dave

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thnkx,
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