You either have actual NULLs in your tables or you have implied NULLs that don't exist in the actual tables but still come up when you do LEFT JOINs etc.
I don't think NULLs are actually a problem in SQL. It's not like we're talking about pointers, it won't cause your server to crash if you use them wrong. NULLs in SQL are fine.
I don't think NULLs are actually a problem in SQL. It's not like we're talking about pointers, it won't cause your server to crash if you use them wrong. NULLs in SQL are fine.