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Oracle® 9i SQL Exam Cram™ 2 (Exam 1Z0-007) by Gavin Powell

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Chapter 15. Answer Key to Practice Test #1

Question 1

Answers B and E are correct. A is invalid because a date cannot be summed up using SUM. B is correct because a maximum (MAX) value for a group of dates can be found. C is incorrect because aggregation functions cannot be applied in a WHERE clause because it filters rather than groups. D is incorrect because the ...

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