Number Owner Balance Type 101 John Smith 1000.00 checking 102 Werner Wei 2000.00 checking 103 John Smith 1000.00 savings 104 Muhammad Jones 1000.00 checking 105 Hugh Martin 10,000.00 checking   What is the result of the following query for the relation Account? SELECT DISTINCT Owner FROM Account Note that we are representing the result as a set {...} of tuples (...), with each attribute explicitly listed along with its value.单项选择题

A

{(Owner: “John Smith”), (Owner: “Werner Wei”), (Owner: “Muhammad Jones”), (Owner: “Hugh Martin”)}

B

{(Number: 101, Owner: “J. Smith”), (Number: 102, Owner: “W. Wei”), (Number: 103, Owner: “J. Smith”), (Number: 104, Owner: “M. Jones”), (Number: 105, Owner: “H. Martin”)}

C

{(Number: 101, Owner: “John Smith”), (Number: 102, Owner: “Werner Wei”), (Number: 103, Owner: “John Smith”), (Number: 104, Owner: “Muhammad Jones”), (Number: 105, Owner: “Hugh Martin”)}

D

{(Owner: “J. Smith”), (Owner: “W. Wei”), (Owner: “M. Jones”), (Owner: “H. Martin”)}

E

{(Owner: “John Smith”), (Owner: “Werner Wei”), (Owner: “John Smith”), (Owner: “Muhammad Jones”), (Owner: “Hugh Martin”)}

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

Name the Supreme Court decision that removed financial constraints on PACs.

Political scientists Joshua Kalla and David Broockman find that senior policy makers made themselves available to _____ between three and four times more often than they did to constituents.

Name the political scientist who argues that parties are designed to serve the needs of ambitious politicians (namely candidates and officeholders).

Name the political scientist who said this famous quote about the problems of pluralism: “The flaw in the pluralist heaven is that the heavenly choir sings with a strong upper-class accent.”

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！