Querying a MYSQL database?

[hyped1]

I use pokeroffice and recently downloaded mysql and converted poker office to use mysql database instead. I want to be able to query the database myself. I backup my database through poker office and it creates a backup of my database as a myz file. Now, how do I query the database within this file? I want to be able to conduct such queries as SELECT playername WHERE vpip > 40 or something like that. Do I need to create a php script to connect to the database in the local myz file and then upload to a webserver and query the database that way? Thanks for any help.