1 What is a foreign key constraint Why are such constraints important What is referential integrity (10 pts) 2 Explain the difference between external, internal, and conceptual schemas How are these different schema layers related to the concepts of logical and physical data independence (10 pts) ...

1 Foreign Key Constraint and Referential Integrity A foreign key constraint is a rule that is applied to a set of one or more columns in a database table It establishes a link between the data in two ...

1. What is a foreign key constraint? Why are such constraints important? What is referential integrity?...

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1. What is a foreign key constraint? Why are such constraints important? What is referential integrity? (10

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Concepts of Database Management

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