53646 Creating a cron job

I am concerned that one table in my database that tracks profile views will grow to a huge size as more members join. I need a mechanism designed to limit how many view entries the database stores, to go back only 30 days, like a cron job that would delete all entries in the profile_views table that are older than 30 days, that way the table would remain much smaller. The cron could run once a day.