How to Create a real one-to-one relationship in SQL Server

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I have two tables, Country and Capital, and I have established the main key for Capital as a foreign key that refers to the key for Country. However, the model is 1 to 0..1 when I use Entity Framework database-first.

In SQL Server, how do you establish a one-to-one relationship?
Aug 18, 2022 in Database by Kithuzzz
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