What create when a primary key combined with a foreign key, Database Management System

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What will be create when a primary key if combined with a foreign key?

A primary key if combined with a foreign key it creates Parent-Child relationship between the tables that connect them.

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Consider the relations described below: PHYSICIAN (regno, name, telno, city) PATIENT (pname, street, city) VISIT (pname, regno, date_of_visit, fee) Where the regno and pname ide

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