Re: Examples of SQL anomalies?
From: Marshall <marshall.spight_at_gmail.com>
Date: Fri, 4 Jul 2008 17:49:36 -0700 (PDT)
Message-ID: <6ad51b62-e66a-4daa-b21c-c361fd6b22f8@8g2000hse.googlegroups.com>
Date: Fri, 4 Jul 2008 17:49:36 -0700 (PDT)
Message-ID: <6ad51b62-e66a-4daa-b21c-c361fd6b22f8@8g2000hse.googlegroups.com>
What can be meaningfully asked is determined by the schema.
If the schema specifies that the weight attribute is nullable, then the question of how much a shipment weighs in total is a question that cannot be asked.
Marshall Received on Fri Jul 04 2008 - 19:49:36 CDT