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Home -> Community -> Usenet -> comp.databases.theory -> Re: So what's null then if it's not nothing?
In article <kfa7o1d714eqdnlfnaik6t1gs6uv4l0b09_at_4ax.com>,
hugo_at_pe_NO_rFact.in_SPAM_fo says...
> >2- You create a parent/root entity/table and make a subtype for each
> >optional field
>
> And that would lead to an exponential explosion of tables. With one
> optional attribute, you get two subtypes. Two optional attributes means
> four subtypes. With 10 optional attributes, you'd need no less than
> 1,024 tables.
You mean you would create a table for each *combination* of attributes? What on earth for?
-- JonReceived on Wed Nov 23 2005 - 02:20:32 CST
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