Comment on 5NF and Database DesignparentComments−petalmindOP4moYeah, no NULL is ever equal to any other NULL, so they are basically unique.−Groxx4moYou are also guaranteed to be able to retrieve your data, just query for '... is null'. No complicated logic needed!
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Yeah, no NULL is ever equal to any other NULL, so they are basically unique.
You are also guaranteed to be able to retrieve your data, just query for '... is null'. No complicated logic needed!