Question: What characterizes un-normalized data? Why is un-normalized data a problem? How do you know when the database is fully normalized? What is a Foreign Key?


What characterizes un-normalized data? Why is un-normalized data a problem? How do you know when the database is fully normalized?

 What is a Foreign Key?

Define a foreign key and describe the use of foreign keys. What data problem does a foreign key solve? What problems do foreign keys introduce?

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