List the characteristics that a table must have to be considered a relation. List two synonyms for “file,” two for “record,” and two for “field.” What are the four uses of a primary key? What are the desirable characteristics of a primary key? What is a surrogate key and when do you use them? What is a foreign key? What is referential integrity and why is it important? What are the three possible interpretations of a null value? What is normalization? Why is it important?
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