How to count NULL columns?

I tried the following command : select count(*) from table where mou_codlet not between "AAA" and "ZZZ" but the result returned is not the same as the following sql command select count(*) from table where mou_codlet not between "AAA" and "ZZZ" ormou_codlet is null Is it normal that the null values are not included in the result of the first sql command ? --------------------- Frederic BOUQUET fbouquet@cornut.fr