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What about NULLs ? Is it allowed or not ? I recently discovered on Wikipedia https://en.wikipedia.org/wiki/First_normal_form https://en.wikipedia.org/wiki/First
by painchoc 5y ago
What about NULLs ? Is it allowed or not ?
I recently discovered on Wikipedia https://en.wikipedia.org/wiki/First_normal_form https://en.wikipedia.org/wiki/First_normal_form that it should not be.
- goto11 5y agoThey should not be allowed according to C.F.Date, but this is quite a controversial opinion. E.F.Codd who invented the relational model thinks nulls are fine.