[xserverx]

Hello
I have 2 queries I would like to execute it every 30min but I don't know how to add it to cronjob

can any one assist me ? please attach he php file that I need to upload to cron directory

queries are :

PHP Code:

update user   JOIN userfield ON user.userid = userfield.userid set user.usergroupid = 2  WHERE user.usergroupid = 4 and userfield.field14 = 'female' 
update user   JOIN userfield ON user.userid = userfield.userid set user.usergroupid = 16  WHERE user.usergroupid = 4 and userfield.field14 = 'male' 


thank you