Im currently running 1.6.2 now for about a year, this is from day one introductory into magento, so over the year I have gained more knowledge with magento, and I would like to move over to new versions and also update when available.
From what I understand, dont touch core, but I can update everything, what im concerned about is the database though.
So for instance I have a base 1.6.2 install with the live database (copied). And I would like to just add the 1.7 files into the directory and overwrite where nessecary. I guess what im asking is, does the database change on versions?