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Home -> Community -> Usenet -> comp.databases.theory -> Re: Any new thoughts on OTLT (One True Lookup Table)
Laconic2 wrote:
> Consider the following code and description pairs drawn from a travel
> reservation system,
>
> <code>
> ("PA", "Pennsylvania")
> ("PA", "Pan American")
> </code>
Doesn't OTLT have to include a third column, 'class' perhaps, with values 'state' and 'airline' respectively?
Otherwise, you can't tell which row to use when displaying the lookup data for a state - and you could end up displaying 'Pan American' as part of someone's address.
-- Jonathan Leffler #include <disclaimer.h> Email: jleffler_at_earthlink.net, jleffler_at_us.ibm.com Guardian of DBD::Informix v2003.04 -- http://dbi.perl.org/Received on Fri Mar 26 2004 - 22:58:21 CST
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