I had a quick flick through MySQL's string functions here and the only thing I found close to what I want to do is the replace function.

I have a field in my table which is numbers seperated by commas. An example would be:

1,2,3,4,5,6

If I wanted to update that field with one value removed is there a MySQL function to remove an item from a list, kind of the opposite to how FIND_IN_SET locates an item in a list ?