When and why do we need to use a compound primary key, Database Management System

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When and why do we need to use a compound primary key

Problem

A. What is a database application?

B. What are entities? Tables? Why are there multiple tables in a database?

C. Why do we declare each field's data type when a table is defined? What are the advantages and disadvantages of doing so?

D. What is a primary key? Foreign key? What purpose do they serve?

E. When and why do we need to use a compound primary key?

F. What are entity relationships? What role do they play in database design?

G. What is a query? When are they used? Why are they important?

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Database Management System: When and why do we need to use a compound primary key

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Database Management System: When and why do we need to use a compound primary key

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