[sqlite] Date arithmetic question

[Fowler, Jeff]

Hello All,
 
SQLite newbie here. I've looked through the email archives and website
trying to find out how to compute the difference in months between two
given dates. Each date is in YYYY-MM-DD HH:MM:SS format.
 
The best I've been able to come up with seems rather ugly:
 
SELECT (strftime( '%Y', date1)*12+strftime('%m',date1)) -
(strftime('%Y',date1)*12+strftime('%m',date1))
 
Am I on the right track, or is there something obvious I'm missing?
 
Thanks in advance,
 
Jeff Fowler