What is necessary for your query on an existing view to execute successfully?（）
第1题：
A. The underlying tables must have data.
B. You need SELECT privileges on the view.
C. The underlying tables must be in the same schema.
D. You need SELECT privileges only on the underlying tables.
第2题：
A、What's your last name?
B、What's your family name?
C、What's your name?
D、What's your first name?
第3题：
AInsurance is necessary for our clients. ;
BI suggest a _Free of Particular Average Policy._ ;
CSure, but there is an extra premium for the buyer’s account.
第4题：
what device sends IGMP Query messages？
第5题：
A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing? ______.
A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard
第6题：
A.
B.
C.
D. The query fails because the subquery returns more than one row.
E. The query fails because the outer query and the inner query are using different tables.
第7题：
If there were only one question left ,what would it most probably be?
A.What was your childhood dream?
B.What is your biggest achievement?
C.What is your parents view of you?
D.What was your handest expenrience in the war?
第8题：
A.describe what you’ll be doing during the observation
B.schedule a meeting to discuss the observation
C.clarify the purpose of the observation
D.it’is not necessary to meet with your colleague or TA to discuss
第9题：
During the period of your employment，if an area is designated as a war zone，you will，whilst in this area，receive such allowance ______．
A.as may be decided upon by the Company
B.as decided upon by yourself
C.as necessary to cover all your expenses
D.as necessary to cover the expenses for your repatriation your home port
第10题：
What is true regarding subqueries?（）