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Comparing a MAX() value to another table

Can I use MAX() after a WHERE clause? I have a table with van usage from where I need the MAX mileage value from every van and then compare it to a value "next_service_due" from another table. How can I do this? I need that information so I can pop up a report on the vans that the have service coming soon. I am using Access 97.

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Yes, you can do what you want, but with the HAVING clause, not the WHERE clause.

Here's a sample query --

select VanNumber, max(VanMileage)
  from VanUsage
 group by VanNumber
having max(VanMileage) >
     ( select next_service_due from AnotherTable )

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This was first published in February 2002

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