Subject Re: [firebird-support] Uniqueness among non-null values in nullable column?
Author Norman Dunbar
On 24/04/12 09:29, Kjell Rilbe wrote:

> SQL Server UNIQUE allows only a single null.

Interesting. That's one for the "Learn something new every day"
department! It does tend to imply that SQL Server is treating NULL (a
lack of a value) as a value in this case?


Norman Dunbar
Dunbar IT Consultants Ltd

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