Hello Julien,
Am Donnerstag, 5. März 2009 schrieb Julien Pedrono:
or if it's possible to know mediawiki password format so that I can change it with a mysql query.
This here worked for me.
UPDATE USER set user_password=md5(concat(user_id,'-',md5('YOURNEWPW'))) where user_name = "JULIEN";
Best Regards P.M.