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Which of the following statements about primary keys, foreign keys, and the referential integrity rule is true? Which of the following statements about primary keys,
Which of the following statements about primary keys, foreign keys, and the referential integrity rule is true? Which of the following statements about primary keys, foreign keys, and the referential integrity rule is true? The referential integrity rule applies only to relational databases A database cannot have zero foreign keys A database file or table can have more than one primary keys All of the above statements are actually true
Which of the following statements about primary keys, foreign keys, and the referential integrity rule is true?
Which of the following statements about primary keys, foreign keys, and the referential integrity rule is true?
The referential integrity rule applies only to relational databases
A database cannot have zero foreign keys
A database file or table can have more than one primary keys
All of the above statements are actually true
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