Search/replace in MySQL field

[Doug Nelson]

Ok, full disclosure, I know nothing about MySQL. It's only through the generosity of others that I've managed my own site for this long.

That said, I have a text field on one table of one database that I need to make a global search an replace of one long string for another, for a couple of thousand records. I basically need to find and replace a single text phrase (5-10 words including spaces) in a description field for every record.

Can this be done via phpmyadmin and some clicking, or would I need a query? And if a query, what (verbatim) would it be?

Thanks in advance.