NOT operator doesn't work in query lucene...

Not operator in regular expression...

'If' statement doesn't return what it's meant to...

MySQL - NOT IN LIKE...

What is meaning of !! in C -- and why is it needed?...

MySQL not and not equal operators fail, what gives?...

Easy SQL Syntax NOT LIKE with AND operators seem to be ignored...

Why does this bitwise shift-right appear not to work?...