Connectivities and cardinalities are usually based on ____________________ rules.
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Q47: A(n) _ attribute need not be physically
Q51: A(n) _ relationship is also known as
Q69: In Crow's Foot notation, an optional relationship
Q71: Failure to understand the distinction between mandatory
Q75: A weak entity must be _-dependent.
Q83: Explain multivalued attributes,and provide an example.How are
Q86: In the original ERM described by Chen,relationships
Q93: A(n)_ relationship exists when two entities are
Q96: In the relationship "EMPLOYEE claims DEPENDENT" the
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