What is difference between foreign key and unique key?
devquora
Posted On: May 27, 2021
- Answered by anusha kadimi
Foreign key is a field in the table that is Primary key in another table Unique Constraint may have a NULL value. Each table can have more than one Unique Constraint. By default, Unique key is a unique non-clustered index. Unique Constraint can not be related with another table's as a Foreign Key
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