primary key as subtype discriminator
From: <philiptaylor51_at_yahoo.com>
Date: Sun, 31 Aug 2008 09:51:29 -0700 (PDT)
Message-ID: <e86eaf4a-3c3d-4de7-989b-ab4517ffd014_at_c65g2000hsa.googlegroups.com>
Hello,
Date: Sun, 31 Aug 2008 09:51:29 -0700 (PDT)
Message-ID: <e86eaf4a-3c3d-4de7-989b-ab4517ffd014_at_c65g2000hsa.googlegroups.com>
Hello,
I have something like:
TABLE A
a PK
TABLE B
b PK
TABLE AB (many-to-many table)
a, b PK
TABLE AB-1 (AB subtype)
a, b PK
TABLE AB-2 (AB subtype)
a, b PK
Can I use the attribute "a" (part of PK) as subtype discriminator?
Thanks,
philip
Received on Sun Aug 31 2008 - 18:51:29 CEST