Hello.
When should I use a Unique Key instead of a Index?
I know that a Unique Key does not allow duplicated values like a Primary
Key, but what more?
Is there some advantage using a Unique Key?
A Unique Key is the same that Alternate Key?
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Atenciosamente,
Hugo Eyng
Hallo Hugo,
When should I use a Unique Key instead of a Index?
I know that a Unique Key does not allow duplicated values like a Primary
Key, but what more?
That, and it creates an index automatically. Also, if you want a column to be
referenced by a foreign key, it has to be either the
Hallo Hugo,
When should I use a Unique Key instead of a Index?
I know that a Unique Key does not allow duplicated values like a Primary
Key, but what more?
That, and it creates an index automatically. Also, if you want a column to be
referenced by a foreign key, it has to be either
