Query for top 5 within every group

Posted on 2009-04-02
Last Modified: 2013-11-28
I have a totals query with 3 fields: Region, Product, and AverageQty. I want a query that will only return the top 5 AverageQty within each region.

I can't recall ever using the drop down in a query to return the top 5. When I try it for this query I only get the top 5 records for a query. What else needs to be done to the query?
Question by:dlogan7
  • 3

Expert Comment

ID: 24054587
which database system you are working with?

Author Comment

ID: 24054618
I'm sorry. I thought I posted this to the Access section. I am using Access 2007.

Accepted Solution

sreindl04 earned 250 total points
ID: 24054796
I was thinking on hierachies in oracle sqlplus but in Access... Use VBA and SELECT TOP might help...

The only idea I have is using unions if you know the regions in advance (see sql example)
SELECT TOP 3 Region, Product, AvgQuantity 

FROM Tabelle1

WHERE region = 1



SELECT TOP 3 Region, Product, AvgQuantity

FROM Tabelle1

WHERE region = 2


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LVL 12

Assisted Solution

koutny earned 250 total points
ID: 24058168
I don't know whether a solution is still required but the query might look something like the code snippet below.
The only problem with that query would be that in case there would be several products with the same averages then the query would show them all - it basically shows all products for each region with averages in the top 5.

I don't know where you are using this query but if you are trying to produce a report then there are other ways of achieving this (subreports).
SELECT R.RegionID, R.RegionName, RA.Product, RA.AverageQty

FROM Regions R INNER JOIN queryRegionAverages RA 

ON R.RegionID = RA.RegionID


RA.AverageQty in (SELECT TOP 5 AverageQty FROM queryRegionAverages RA2 WHERE RA.RegionID = RA2.RegionID ORDER BY RA2.queryRegionAverages DESC)

ORDER BY R.RegionID, RA.AverageQty DESC

Open in new window


Expert Comment

ID: 24068836
The point with the "same" averages prevented me from providing an sql with subselects. You might work with subsubselects but I do not know if access supports this kind of queries and the performance impact might be high. Access does not scale very well with subselects especially when working on shares.

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