>>>> 2012/03/16 13:30 -0400, Simon Wilkinson >>>>
My query for this is as follows: select * from table where table.date1 -
table.date2 between 28425600 and 29030400;
<<<<<<<<
I would not count on that subtraction s yielding a meaningful number: the types are not
Unix timestamps. I would use TIMESTAMPDIFF, with a good unit.
From the downloaded help file:
>>>>
Date arithmetic also can be performed using INTERVAL together with the
<file:///C:/Program%20Files/MySQL/MySQL%20Server%205.1/HELP/functions.html#operator_plus>+
or
<file:///C:/Program%20Files/MySQL/MySQL%20Server%205.1/HELP/functions.html#operator_minus>-
operator:
date + INTERVAL expr unit
date - INTERVAL expr unit
<<<<
but subtracting timestamp from timestamp hoping for a while (interval) is not mentioned.
If you want the subtraction to work, make them big integers and use UNIX_TIMESTAMP and
FROM_UNIXTIME. See
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html
