SQL Server database mirroring and primary key?

Uniqueidentifier has a use here (and is mandatory in some cases) but still not as clustered index. And you use NOT FOR REPLICATION clauses on triggers and IDENTITY etc.

No reason at all. In mirroring only one database is in-use so there are no collision issues. Is someone confusing this with replication where several sites are in-use and synch to each other?

Uniqueidentifier has a use here (and is mandatory in some cases) but still not as clustered index. And you use NOT FOR REPLICATION clauses on triggers and IDENTITY etc.

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