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You cannot have an invalid entry in the foreign key column; at the same time, you cannot delete a vendor row as long as a product row references that vendor. This isknown as _____.
Q8: In the context of total completeness, in
Q12: The _ rule states that only one
Q16: In Oracle, _ retrieves the current value
Q17: Only a single attribute, not multiple attributes,
Q29: BEFORE means before the changes are made
Q38: The ANSI SQL standards are also accepted
Q48: When you create a new database, the
Q48: RDBMSs enforce integrity rules automatically.
Q49: A system will perform best when its
Q72: An entity cluster is a "virtual" entity