What are the best practices for using primary keys in databases?

What are the best practices for using primary keys in databases?

The best practices for primary keys include ensuring they are unique, non-null, and stable over time.

Why is it important for primary keys to be unique?

Unique primary keys ensure that each record can be uniquely identified, preventing data duplication.

Can you give an example of a good primary key?

A good primary key example is a user ID that is auto-incremented, ensuring uniqueness for each user.

What should I avoid when choosing a primary key?

Avoid using mutable data like names or emails as primary keys, as they can change and lead to inconsistencies.