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How does a primary key work?

Hello everyone.

I understand Oracle PL/SQL and Transact SQL, I'm starting to learn ABAP but I would like to know how does a primary key work in a table dictionary, I mean, how to create a sequence (Oracle) or Identity (SQL Server), is this necesary? I've been searching in google but I notice everybody just declare a column as a Primary Key and nothing else.

Thank you in advance.

Former Member
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