当前位置: Oracle DBA培训网-优技培训 >> 071题库 >

【071题库】最新OCP-071考试题库解析-第38题

【071题库】最新OCP-071考试题库解析-第38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38题、choose two

View the Exhibit and examine the structure of ORDER_ITEMS and ORDERS tables.

You need to remove from the ORDER_ITEMS table those rows that have an order status of 0 or 1 in the ORDERS table.

Which two DELETE statements are valid? (Choose two.)

A) DELETE

FROM order_items

WHERE order_id IN (SELECT order_id

FROM orders

WHERE order_status in (0,1));


B) DELETE *

FROM order_items

WHERE order_id IN (SELECT order_id

FROM orders

WHERE order_status IN (0,1));


C) DELETE

FROM (SELECT * FROM order_items i,orders o

WHERE i.order_id = o.order id AND order_status IN (0,1));


D) DELETE FROM order_items i

WHERE order_id = (SELECT order_id FROM orders o

WHERE i.order_id = o.order_id AND order_status IN (0,1));

Answer:AC

(解析:B 和 C 语法不对,可以实验,都会报错)

技术沙龙MORE+

Oracle技术沙龙:【数据保护顶尖技术-MAA】首次全国首播12c MAA技术 云数据库加上MAA技术组成最豪华的技...
Oracle技术沙龙第49期:【Oracle 数据库云技术分享】Oracle技术沙龙第49期:【Oracle 数据库云技术分享】本次技术沙...
Oracle技术沙龙第48期:【Oracle 12c RAC安装】小编:今天讲什么内容呢?以后有什么用呢? 大师:今天讲的是12c...
我要参加技术沙龙

关闭