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Old December 4th, 2005, 04:16 PM
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Default Aggregate Function

What i am aattempting to do is create an aggregate function that multiplies together all of the results from a query. For example, if the query contained 1,2 and 5, the aggregate function would return 10. It would not seem to be difficult to do this, but I am a new Access user, and am having trouble with these aggregate functions. Please help me if you know how.

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Old December 4th, 2005, 05:40 PM
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Need a little more info on what your trying to accomplish. if you're wanting to multiply all the values from a query against each other, you're probably gonna have to write some sort of custom function that loops through the results.

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Old December 4th, 2005, 08:04 PM
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I was thinking that was what would be necassary.

I have a table of monthly return data for an investment. What the function will do is multiply together a compound return for the period in question. If i knew the VBA for the sum function, it would be a simple matter of switching the +'s to *'s.

Below would be a specific example:

Date Return
Oct 05 1.1%
Nov 05 1.3%
Dec 05 2.5%

If I specified a three month time period through a form (i can do this part), I might get data like above. What I would wantr to see is the compound return, which would be 1.011(1+the return value)times 1.013 times 1.025, or 1.0497 as a totak number. This data item indicates a that there is a 4.97% return over that time period. Again, so easy in Excel, so hard in Access. Thanks for helping out.

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Old December 5th, 2005, 09:24 AM
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Can you write out the formula that you would have used in Excel that you want to duplicate in Access?


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