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# Calculated age field rounding up

Posted on 2006-05-18
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I am calculating camper's age at camp date using DateDiff in a query.  However this formula rounds up giving me the wrong age for campers whose birthdays falls after camp.  Here's the formula I have in m y query:

CampAge: DateDiff("yyyy",[DOB],[EndDate])

I then tried to use int(agevalue) as follows:

CampAge: Int(DateDiff("yyyy",[DOB],[EndDate]))

This gives me the same result, perhaps because I'm trying to use int with DateDiff

How can I get the calculated age field not to round up?
Would it be better to put this in a function instead of in the query?

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Question by:fernw
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Accepted Solution

EDDYKT earned 500 total points
ID: 16709881
may be use day

DateDiff("d",[DOB],[EndDate]))/365.25
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Author Comment

ID: 16710215
That works.
Thanks!
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LVL 18

Expert Comment

ID: 16716284
that won't always work, you need to do something like

year(enddate) - year(dob) - iif(month(dob)>month(enddate) or month(dob)=month(enddate) and day(dob)>day(enddate),1,0)
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Author Comment

ID: 16717290
I see what you're saying - that if the DOB is in the same month and later than or equal to the enddate, the days/365.25 formula will still give the wrong result (rounded up by 1).  That's probably okay for this application - if a camper turns 10 during the month that camp happens we can say he is 10.  However, for accuracy and general use I would use your formulation.

Sorry I can't award any more points  since I already accepted the other answer- at least I don't think I can. If there's a way to do it, please let me know.

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