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Which is the default column or columns for sorting output from compound queries using SET operators such as INTERSECT in a SQL statement?
Correct Answer: D
For the sorting of output in compound queries (INTERSECT, UNION, etc.): * D. The first column in the first SELECT of the compound query: By default, Oracle does not automatically sort the results of SET operations unless an ORDER BY clause is explicitly stated. However, if an ORDER BY is implied or specified without explicit columns, the default sorting would logically involve the first column specified in the first SELECT statement of the compound query.