Yes, it has a special purpose for finding invalid characters. Try searching for "?".
I tried that based on the filemaker documentation which said using "" should work. Alas, it did not.
Yeah it usually works for me. Let's see. What is in the fields that show up without the question mark?
Its a tough one.
It can't be null values as some of the ones that are omitted have null values.
It can't be negative numbers for the same reason.
There are records with nothing "off" about them and they are in the found set when I quick find ?.
The interesting is that when I quick find "?" the found set is larger than ?
I think it may be a safer option to create a calcualtion field that uses patterncount, using all the fields that you want to search on within the table.
This way, you would be able to find not only all records with the "?" in a field, but HOW MANY question marks, which could be useful??
I know it's not filemaker's quickfind, but it is pretty quick and it works.