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MS Access - Query - return 2 records for each

Posted on 2012-04-11
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Last Modified: 2012-04-11
I need to return only 2 records for EACH [ExpenseAccount] in @groupedStrings from [Source_Data].  [Source_Data] has thousands of matches for each value in @groupedStrings

The query I have below returns all.  I only want 2 records for each.  How do I do that?


SELECT [@groupedStrings].ExpenseAccount, Source_Data.AssetNumber
FROM ([@groupedStrings] INNER JOIN ExpenseAccount_RAMBO ON [@groupedStrings].ExpenseAccount = ExpenseAccount_RAMBO.[Payable Expense Number]) INNER JOIN Source_Data ON ExpenseAccount_RAMBO.lessor = Source_Data.LessorCode;

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Question by:keschuster
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Expert Comment

by:David Kroll
ID: 37834212
SELECT TOP 2 [@groupedStrings].ExpenseAccount, Source_Data.AssetNumber
FROM ([@groupedStrings] INNER JOIN ExpenseAccount_RAMBO ON [@groupedStrings].ExpenseAccount = ExpenseAccount_RAMBO.[Payable Expense Number]) INNER JOIN Source_Data ON ExpenseAccount_RAMBO.lessor = Source_Data.LessorCode;
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Author Comment

by:keschuster
ID: 37834221
That only returns 2 records TOTAL.  I need 2 records from the joined table [Source_Data] for EACH matching record in @groupedStrings
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Author Comment

by:keschuster
ID: 37834235
@groupedStrings contains the values

1
2
3

Source_Data contains

1
1
1
1
2
2
2
2
2
2
3
3
3
3
3

I want back just 2 records for each match.  So from source data I want

1
1
2
2
3
3
0
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LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 37834455
among the numerous records of 1 's (for example)  what criteria are applied to get the two records?
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Author Comment

by:keschuster
ID: 37834490
Let me better illustrate

The more I think about it my original stab at the sql may be too complicated.

The table looks like this

ExpenseAccount     | VIN
1                             | 10
1                             | 11
1                             | 12
2                             | 20
2                             | 21
2                             |22


So for a single ExpenseAccount there can be many VIN's.  Vins are unique

What I want to return is for each unique ExpenseAccount any 2 Vins
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LVL 120

Expert Comment

by:Rey Obrero (Capricorn1)
ID: 37834675
where is the field VIN coming from?

better if you can upload a sample db..
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Author Comment

by:keschuster
ID: 37834783
see atttached
sample.accdb
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Accepted Solution

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Rey Obrero (Capricorn1) earned 2000 total points
ID: 37834952
try this query

SELECT tblFeed_Rambo.ExpenseAccount, Max(tblFeed_Rambo.VIN) AS MaxOfVIN
FROM tblFeed_Rambo
GROUP BY tblFeed_Rambo.ExpenseAccount
Union ALL
SELECT tblFeed_Rambo.ExpenseAccount, Min(tblFeed_Rambo.VIN) AS MaxOfVIN
FROM tblFeed_Rambo
GROUP BY tblFeed_Rambo.ExpenseAccount
Order By 1
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Author Comment

by:keschuster
ID: 37835000
Interesting approach....  you win.  Thanks
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