Contact Age Query

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#680

From: Jason Summers
Date: Fri, 02 Nov 2007 02:27

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Hello Again,

I have a database of contacts, and each contact has a birthdate (CBIRTHDAY). 
I'm using the following query to determine which contacts are at least X 
years old.

select CONTACTID from CONTACTS where (('Now' - CBIRTHDAY) / 365) > [Age X]

Question is, if CBIRTHDAY is indexed, will the Interbase Optimizer be able 
to utilize this index using this query?  Since this is a calculation, I'm 
not sure if it'd be smart enough to know.

Or if that query cannot be optimized how about this one?

select CONTACTID from CONTACTS where ('Now' - CBIRTHDAY) > ([Age X] * 365)

(assume [Age X] * 365 was precalculated and put into the query string)

If neither of these queries are going to run quickly, any recommendations on 
what I could do to speed this up?

Thanks everyone,
- Jason

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Subject: Contact Age Query
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