Why shouldn't we allow nulls? (2011)(dba.stackexchange.com)
dba.stackexchange.com
Why shouldn't we allow nulls? (2011)
https://dba.stackexchange.com/questions/5222/why-shouldnt-we-allow-nulls
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https://dba.stackexchange.com/questions/5222/why-shouldnt-we-allow-nulls
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