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Entity integrity requires that the Group of answer choices primary key exists as a foreign key in the related table. primary key cannot be null.
Entity integrity requires that the
Group of answer choices
primary key exists as a foreign key in the related table.
primary key cannot be null.
foreign key exists as a primary key in the related table.
primary key cannot be unique.
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Logidata+ Deductive Databases With Complex Objects Lncs 701
Authors: Paolo Atzeni
1st Edition
354056974X, 978-3540569749
