【071题库】最新OCP-071考试题库解析-第15题
071考试是OCP考试科目的一种，由于071考题多变，我们专门收集整理了最新的考试题库，并对这些考题进行讲解，希望可以帮助广大考生。
每周五晚8点，我们有免费的OCP解析公开课，地址：https://ke.qq.com/course/326223 OCP题库交流群：1015267481，验证ocp
-------------------------------------------------------
071题库-第15题、choose the best answer
View the Exhibit and examine the structure of the ORDER_ITEMS table.
Examine the following SQL statement:
SELECT order_id, product_id, unit_price
FROM order_items
WHERE unit_price =
(SELECT MAX(unit_price)
FROM order items
GROUP BY order_id);
You want to display the PRODUCT_ID of the product that has the highest UNIT_PRICE per ORDER_ID.
What correction should be made in the above SQL statement to achieve this?
A) Replace = with the >ALL operator.
B) Replace = with the >ANY operator.
C) Remove the GROUP BY clause from the subquery and place it in the main query.
D) Replace = with the IN operator.
Answer：D
(解析：题意是希望显示每个 ORDER_ID 具有最高 UNIT_PRICE 的产品的 PROT_ID 的信息)
-
标签错误:<!-- #Label#
labelId=20160707140604
moduleId=1
classId=12231768634
orderby=2
fields=url,title,u_info
attribute=
datatypeId=22192428132
recordCount=3
pageSize=
<htmlTemplate><dt><img src="/images/index_26${index}.jpg" width="100" height="62" /><a href="$url" title="${title}">${title}</a><span>${api.left(u_info,60)}</span></dt></htmlTemplate>
-->
- 我要参加技术沙龙
