question about Sum()

[Daniel Chicayban]

Query:
SELECT Count(id) AS Taken FROM ClassGuests WHERE id=5
Returns 1 record, value 0

Query:
SELECT Sum(nGuests) AS Taken FROM ClassGuests WHERE id=5
Returns 1 record, value '' (nothing)

And
Query:
SELECT Count(id)+Sum(nGuests) AS Taken FROM ClassGuests WHERE id=5
Returns 1 record, value '' (nothing)

I expected to be 0, but it's not. And because of that I need to convert this through code. Is that anyway to force Sum() to return 0 if nothing found?

Thanks.
Daniel

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