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4. Refer to the tiny sample relational database above. The purpose of a primary key field in a
table is to uniquely identify the entity in that row of data. What is the purpose of a foreign key
(il) field, is in the Pet table above? According to the data above or on the previous page, who
owns a dog named Rover who weighs 12 pounds? If the anmal control department of a local
government with the dataset above finds. Rover, what telephone number ikould they eall?

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