Is there a command for this?

For a while I was allowing users to add pictures in their profiles. Well, I turned this feature off, but the pictures are still showing up, I *believe* because they are from other URLs. Well, my question is, is there a MySQL command that would "clear" this field in all the users, versus me having to do it manually for each and every user?

Sure, backup your database and run this query:
UPDATE w3t_Users SET U_Picture = "";

SWEEEET!

That did it! Many thanks, Astaran...

Ok, what command is needed to check "yes" for all the users in the "be visible on the whos online"??

I know it's gonna be almost identical to the above with the exception of the "U_picture" part, but I've looked and I'm not for sure how to figure out what exactly should go there...any advice?

Thanks.

UPDATE w3t_Users SET U_Visible = 'yes'