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Database Systems Study Guide: Practice Test 57 (Chapter 15)
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Any attribute that is present in the having clause without being aggregated must appear in the
SQL implicitly extracts the value from the single attribute of the single tuple in the relation, and returns
The symbol that can be used in the select clause to denote 'all attributes', is
In SQL, identification of patterns are
The constraint on an attribute specifies that the null value is not allowed for that attribute, is known to be
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