Re: modeling / null-values in composite pk?

>Don't use a primary key, instead create a unique index on the three columns,
>same as a primary key but allows NULL values (see post What is Difference
>between Primary Key and Unique Index)

is this standard relational semantic e.g. does sql7 treat this the same way?

anyway, thanks. hadn't known this

ciao, jan

http://www.rsp.de - Software zur effizienten Erstellung und Verwaltung von Gutachten, Analysen, Pruefprotokollen etc. Received on Sat Jan 22 2000 - 04:53:07 CST