OCP 11g认证考试题库：051-119题
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119. Examine the data in the ORD_ITEMS table:
ORD_NO ITEM_NO QTY
1 111 10
1 222 20
1 333 30
2 333 30
2 444 40
3 111 40
Evaluate the following query:
SQL>SELECT item_no, AVG(qty)
FROM ord_items
HAVING AVG(qty) > MIN(qty) * 2
GROUP BY item_no;
Which statement is true regarding the outcome of the above query?
A. It gives an error because the HAVING clause should be specified after the GROUP BY clause.
B. It gives an error because all the aggregate functions used in the HAVING clause must be specified in
the SELECT list.
C. It displays the item nos with their average quantity where the average quantity is more than double the
minimum quantity of that item in the table.
D. It displays the item nos with their average quantity where the average quantity is more than double the
overall minimum quantity of all the items in the table.
Answer: C
