erd, Database Management System

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Table_Name( attribute_1, attribute_2, attribute_3, ….. ,attribute_x)
Primary Key ( attribute_1, attribute_2)
Foreign Key attribute_4 References Table_Name_2 (repeat for each foreign key)
Alternate Key (attribute_5, attribute_6) (repeat for each alternate key) Additionally primary keys should be underlined.

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Answer, what is database management system? & why it is required?

what is database management system? & why it is required?

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