Discussion
Views constructed from SQL SELECT statements that conform to the SQL-92 standard may not contain:
Answer: C
Correct answer: ORDER BY.
SQL-92 forbids ORDER BY in a view definition, on the ground that a view is a relation and a relation has no inherent order; the ordering belongs to the query that reads the view. WHERE, GROUP BY and FROM are all permitted. Oracle relaxes the restriction, which is a departure from the standard rather than the standard itself.
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