| Subject | RE: [Firebird-Architect] unique constraint on NULL column? |
|---|---|
| Author | Maurizio Lotauro |
| Post date | 2003-05-21T22:03:52Z |
On 20-May-03 08:16:15 Dmitry Yemanov wrote:
Bye, Maurizio.
>Brad,What happen if the index has more than one field?
>> This is great and something I didn't realize had been changed
>> in 1.5. So I
>> can have a column with a unique constraint and multiple rows
>> with NULL in them right?
>Right. Only not-null values are required to be unique.
Bye, Maurizio.