Question

I have the following simple MySQL query, called from PHP:

SELECT foo_id, SUM(number_of_guests)
FROM guests 
WHERE foo_id = $foo_id
GROUP BY foo_id

This works fine, except for one $foo_id, which returns about 2.5 times greater than the sum of the number_of_guests field.

What could cause this behavior for only a certain value of $foo_id?

Is there a better way to do this?

Answer 1

The problem is that there was one row with a large value for number_of_guests. I didn’t see in in browsing the data because there are a few hundred rows. It didn’t show up when I copied and pasted from HTML page into Excel because that row was missing most of the other columns, and the HTML page has all the columns.

Thanks for all your help!