first, don't call the column 'timestamp' -- you'll run into issues/confusion at somepoint w/that being a reserved word ..

As for splitting up the value, you can use split or regex (perlre) or one of the many Date modules .. examples of the first two are below (i recommend error-checking on them) 
my ($y, $m, $d, $h, $min, $s) = split /[- :]/, $timestamp;
my ($y, $m, $d, $h, $min, $s) = $timestamp =~ /^(\d{4})-(\d\d)-(\d\d) 
+(\d\d):(\d\d):(\d\d)$/;   # more robust

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In reply to Re: conversion of a timestamp by davidrw
in thread conversion of a timestamp by barrycarlyon

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