大數據就業實戰培訓 Oracle就業實戰培訓
071考試題庫之前是比較穩定的，但隨著Oracle的調整，071考試不斷的增加新的考題，增加了考試的難度，所以我們專門收集整理了這些考試，并對這些考題進行解析，希望可以對考生有幫助。
每周五晚8點，我們有免費的OCP解析公開課，地址：https://ke.qq.com/course/326223 OCP題庫交流群：1015267481，驗證ocp
-------------------------------------------------------
071考試-第38題、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 語法不對，可以實驗，都會報錯)
