Eko-

first off, sorry for the informality, i don't have a clue as to the region 
of the world you are from, nor which pronoun to use to address you, so i 
decided to settle with being informal

now, there's two solutions. i don't know which is better for you, but the 
best thing i can think of is to reference the response of Deane 
Rothenmaier and say to use that response to learn WHY you were having a 
problem.

now that we have explained WHY there is a problem, we need to figure out 
the best solution. to do this we need to look at what your situation is. 
from the line
>> I have question. I got a piece of date data from MySQL
i know you are interacting PERL and MySQL. here's the good news, MySQL 
actually has a large number of function meant to be helpful and when you 
can have the DB do what you want, it will be the fastest way most of the 
time due to streamlining done by the folks over at MySQL. in this case, i 
know from PHP experience that PERL does not need to do the work. you will 
need to evaluate this as a possibility for your situation, but i suggest 
getting the orielly book i have on MySQL i am not sure off the top of my 
head having not used it for a little... i believe it's "Managing and Using 
MySQL" I've got some links at the end to MySQL books by oreilly.

moving onto the point....

there are functions WITHIN MySQL for adding dates. for the exact use, see 
the online manual at the MySQL official website, or your favorite MySQL 
book (and if your book doesn't have it, i would suggest finding a new 
favorite book)

the other option is converting your MySQL to epoch, adding the seconds 
since that is what it LOOKS like you are trying to do, and then converting 
back to Julian. you can retrieve it as epoch instead of Julian by using 
UNIX_TIMSTAMP($field) in the call instead of $field.

i know this from experience. for the site i made when i was doing that 
freelance for work, i used epoch for all my comparisons.

i'm sure the time packages of PERL can give you the conversion functions 
if you want PERL to do the work instead of MySQL


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-Josh Perlmutter
Systems Engineer
SeaChange International
http://www.schange.com

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