Thanks Hugo. That would seem to be a very specific case, I wouldn't have thought it was a good reason to make a general case for using COALESCE over ISNULL.

Personally I do tend to use COALESCE, even with only two arguments. That way, if you do need to add more arguments in future you don't have to worry about changing it. Unless I do need to take advantage of the implicit CASTing to the first argument's type, in which case I'll use ISNULL.

As always, I suppose, "it depends". 😉