The de-facto "easy" primary key for ages has been the auto-incrementing integer. Upon insertion of a new record, the database simply increments a counter for the table and uses the new value for the primary key of the inserted row. It's simple to setup, requires no maintenance, and guarantees a predictable key. For my own purposes, I was under the notion that I should always use auto-incrementing primary keys. They were an obvious choice for many of my databases and I never needed to consider alternatives.


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