Is it possible to have data expire?

[Anon]

I'm curious. I'm creating a page where a user inserts data into a "jobs" database. I was thinking it would be nice if they could have a box to insert the date in which the job would expire.

I'd like the job to no longer show up during the query once the date has passed? Is there a function that does this? Is this perhaps a MySQL function, and if so which would I use?

I'm storing all of my entries with a UNIX timestamp.

Thanks in advance