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Informix SQL get age from ddmmyyyy field

Posted on 2011-02-22
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Last Modified: 2012-05-11
The code below is not accurate as it only minuses the year

year(today)-year(DOB) as AGE

does anybody know a more accurate way of returing a persons age taking into account the day and month of the year as well?


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Question by:JCTDD
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Expert Comment

by:jhp333
ID: 34956558
1. Simple, but approximate solution:
select ((today - DOB) / 365.25)::int

2. Accurate one:
select year(today) - year(DOB) - case when mdy(month(DOB),day(DOB),year(today)) > today then 1 else 0 end
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Author Comment

by:JCTDD
ID: 35014658
running 2. Accurate one: in aqua studio I get error:

"Invalid day in date"

select year(today) - year(mailing_code) - case when mdy(month(mailing_code),day(mailing_code),year(today)) > today then 1 else 0 end
from table_1

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do you know what is wrong?
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Author Comment

by:JCTDD
ID: 35014663
example DOBs from the mailing_code field:
mailing_code
26/03/1941
1/10/1958
21/07/1961
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Accepted Solution

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jhp333 earned 500 total points
ID: 35014860
You need to set an environment variable, DBDATE.
It seems your date format requires DBDATE="DMY4/"
Actual syntax for setting environment variable depends on the OS.
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