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- From: ggarcia@mipos2.intel.com (Gilbert Garcia)
- Newsgroups: comp.databases,comp.databases.oracle,comp.databases.theory
- Subject: QUESTION: Modeling problem using ERWIN/SQL
- Message-ID: <C0rr0q.12p@inews.Intel.COM>
- Date: 13 Jan 93 01:34:01 GMT
- Sender: news@inews.Intel.COM (USENET News System)
- Organization: Intel Corporation, Santa Clara, CA USA
- Lines: 23
- Nntp-Posting-Host: mipos2
-
- Hello ERWIN/SQL users,
-
- I'm wondering if anyone would know if ERWIN/SQL supports this modeling
- problem:
-
- Suppose I have a table called CARD. One of the attributes in CARD is
- a field called CARD_TYPE. Another table exists called CARD_DEVICE which
- given a CARD_TYPE, there exists a corresponding DEVICE_TYPE. So far this
- is what I have:
-
- CARD CARD_DEVICE
- -------- -----------
- card_id card_type
- card_type device_type
-
- Now suppose I want to create subtypes of CARD and use DEVICE_TYPE
- as the discriminator. Does ERWIN/SQL allow me to do so?? If so, how?!?
-
- Any feedback will be greatly appreciated.
-
- Thanks, in advance,
-
- Gilbert H. Garcia
-