i wonder if one should have NULL in the fields with no value, or should it be empty?
what is best?
thanks
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i wonder if one should have NULL in the fields with no value, or should it be empty?
what is best?
thanks
There is a certain argument that you should never allow NULL in your data, if you are using it to indicate that you don’t know what the value should be or that you just don’t have that data yet then use an explicit value in the field to indicate those states. Similarly for ’empty’ fields. That said, I think everyone does it or has done it and may do it again. NULL has odd comparative properties which is why it’s always best, if you can, to avoid it and have explicit values for missing data states.