更多"For relation R where primary key co"的相关试题:
[单项选择]For relation R where primary key contains multiple attributes,no non-key attribute should be functionally dependent on a part of the primary key. This relation R is at least in（）
A. 1NF
B. 2NF
C. 3NF
D. BCNF
[单项选择](It was) (in the) primary school (where) my teacher introduced (me to) computers.
A. It was
B. in the
C. where
D. me to
[单项选择]You define a multiple-row subquery in the WHERE clause of an SQL query with a comparison operator "=".What happens when the main query is executed?（）
A. The main query executes with the first value returned by the subquery.
B. The main query executes with the last value returned by the subquery.
C. The main query executes with all the values returned by the subquery.
D. The main query fails because the multiple-row subquery cannot be used with the comparison operator.
E. You cannot define a multiple-row subquery in the WHERE clause of a SQL query.
[单项选择]Where is （）key to the door, Jim
A. a
B. the
C. x
[单项选择]Where is my key I forgot ______ it in my pocket when I locked the bike.
[单项选择]Where could she ______ the key I couldn't find anywhere.
A. put
B. have put
C. has put
D. had put
[单项选择]Where could my son ______the key I couldn't find anywhere.
A. put
B. have put
C. has put
D. had put
[单项选择]Primary responsibility for establishing design and test specifications rests with ______ .
A. senior management
B. procurement
C. engineering
D. quality control
[单项选择]The primary dissimilarity between the youth market in Europe and that in the U.S. is that______.
A. the volume of sales in Europe is more enormous than that in America
B. there are more abundant sorts of goods in Europe than in America
C. the prominent consumers in the youth market in Europe are the working youth
D. the young customers in Europe have comparatively larger purchasing power
[单项选择]What laboratory finding is the primary diagnostic indicator for pancreatitis ？（）
A. Elevated blood urea nitrogen (BUN).
B. Elevated serum lipase.
C. Elevated aspartate aminotransferase (AST).
D. Increased lactate dehydrogenase (LD).
[单项选择]The primary purpose of desk rearrangement is
A. for the teacher to divide students into small groups.
B. to make it possible for students to interact with each other.
C. for the teacher to find out how students think.
D. to give students more opportunities to practice speaking.
[单项选择]Which statement describes the primary difference between the WX and WXC platforms?（）
A. The WX platform has built-in hard drives.
B. The WXC platform has no built-in hard drives.
C. The WX platform uses Network Sequence Caching technology.
D. The WXC platform uses the Network Sequence Caching technology
[单项选择]Where is Belfast
A. In Ireland.
B. In Wales.
C. In Northern Ireland.
D. In Scotlan
