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Question ID 16176

What is a property of window functions in SQL commands?

Option A

They can be used to calculate moving averages over various intervals.

Option B

They group rows into a single output row.

Option C

They can be used between the keywords FROM and WHERE in a SELECT command.

Option D

They don't require ordering of data within a window.

Correct Answer A
Explanation


Question ID 16177

Review the following code:
SELECT pn, vn, sum(prc*qty)
FROM sale
GROUP BY CUBE(pn, vn)
ORDER BY 1, 2, 3;
Which combination of subtotals do you expect to be returned by the query?

Option A

(pn, vn)

Option B

( (pn, vn), (pn) )

Option C

( (pn, vn) , (pn), (vn) )

Option D

 ( (pn, vn) , (pn), (vn) , ( ) )

Correct Answer D
Explanation

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