PHP Skills not there. Need Query Help

[Yahhoon23]

Alright, as the title says I'm not too intelligent when it comes to queries yet so I have a question.

I'm sure this may come easy to most of you, so here goes.

I want to take information that they type in their profile and put it into a field in my DB.

I've already created the new field in my user table. I use a prefix "wireless"

The new field is called "fromwho" without the quotes and it uses the "varchar" of 125. The Null is set to No and for default field it is blank. If that matters.

So once they go into their profile, there is a required field asking where did they hear about my site, it's also in the registration as well.

So once they either insert it into the registration or their profile, if they were registered before I implemented that field, that their info they put in that box will be updated into the user table under the field fromwho.

I'm not exactly sure if I have to do a update table or change table or the syntax I have to use. I tried a few things but was lost.

Obviously I need to run a query with table prefix changing or updating the user table under the fromwho field . The fromwho field is setup already as I have said, all that is left is for me to get the actual query i need to put in the profile page or register page. Also it has to be the text their inputted because it's a empty text box, not a radio button etc.

Any help would be great.