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08.06.2008 at 11:06PM PDT, ID: 23628342
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7.8

SQL-query: select max-value

Asked by efferz in SQL Query Syntax, Microsoft Access Database

Tags: , , ,

Hi,

having a table A which looks like

DATE                CRIT1                  CRIT2            CRIT3            X              Y              Z
1/1/1990           1/20/1990           300                black            23             2               5
1/1/1990           1/20/1990           300                black            4               1               4
1/1/1990           1/20/1990           310                black            10             4               4
1/1/1990           1/20/1990           320                white           4               5               4
1/2/1990           1/20/1990           340                red               0               1               5
1/2/1990           1/20/1990           340                red               3               1               6
1/2/1990           1/17/1990           310                white           20             2               5
2/1/1990           2/20/1990           320                black            6              2               5
2/1/1990           2/20/1990           320                black            4              2               5
2/1/1990           2/25/1990           350                black           24             2               5          

where for the same DATE there could be duplicate entries for the critaria combination CRIT1, CRIT2 and CRIT3. How to build a query which shows only the row with the max(X) value for duplicate criteria. The result should look like

DATE                CRIT1                  CRIT2            CRIT3            X              Y              Z
1/1/1990           1/20/1990           300                black            23             2               5
1/1/1990           1/20/1990           310                black            10             4               4
1/1/1990           1/20/1990           320                white           4               5               4
1/2/1990           1/20/1990           340                red               3               1               6
1/2/1990           1/17/1990           310                white           20             2               5
2/1/1990           2/20/1990           320                black            6              2               5
2/1/1990           2/25/1990           350                black           24             2               5          

Regards,
MartinStart Free Trial
[+][-]08.06.2008 at 11:13PM PDT, ID: 22178286

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[+][-]08.06.2008 at 11:25PM PDT, ID: 22178356

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About this solution

Zones: SQL Query Syntax, Microsoft Access Database
Tags: Microsoft, Access, 2000, SQL-Query
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Solution Provided By: angelIII
Participating Experts: 2
Solution Grade: A
 
 
[+][-]08.06.2008 at 11:56PM PDT, ID: 22178503

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