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  • Adam Thurgar
    • Oct 16, 2018
    • 1 min read

Indexes on foreign keys


SQL Server automatically creates a clustered index on a primary key column/s.

You can change this to be a non clustered index if required, maybe there is a better choice for the clustered index.

When you create a foreign key, nothing happens except the building of the PK/FK relationship.

Should creating a FK also create a non clustered index. I think that it should.

This could help query performance, especially joins.


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