题目内容

在关系SC中，查询学习课程号为′DB′，且成绩在60至90之间的学生学号的正确的 SQL命令是

A. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE DETWEEN 60 AND 90
B. SELECT SNO FROM SC WHERE CNO=′DB′OR GRADE BETWEEN 60 AND 90
C. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＞=60 AND 90
D. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＜=60 AND GRADE＞=90

查看答案

搜索结果不匹配？点我反馈

更多问题

组织的全员公关培洲即指对全员进行公关教育，其重点是【】

A. 公关知识普及教育
B. 公关思想及意识教育
C. 政治思想教育
D. 公关能力教育

查看答案

A．To visit the city.B．To trade with foreigners.C．To build one of the busiest seaports.

A. To visit the city.
B. To trade with foreigners.
C. To build one of the busiest seaports.
D. To look for jobs.

查看答案

听力原文： There are stock markets in large cities in many countries. Stock markets in Paris, London, Tokyo, Shanghai and New York are among the largest and most well-known. The stock market, also called stock exchange, is a place where people can buy or sell shares in a factory or company. And each share means certain ownership of a factory or company.
Different people buy shares through the stuck markets. Some are rich, who want to get more money than they have. Others are not very rich, and buy shares to try to become rich. Still others buy shares as part of their plan to save money.
Of course, investing money in the stock market is not the safest way to make money. No one can tell exactly whether the shares will be doing well. The factory or company may do badly. Then the shares or stocks will go down, and the investors will lose money. The stock may go up or down for a number of untold reasons. Everyone wants the stock to go up, but sometimes even if a factory or company does a good job, the stock may still go down.
No wonder buying shares through the stock market is often compared to gambling. All are eager to make money by "gambling" in the stock market. Factories and companies that need money are pleased that so many people are willing to "gamble". Indeed, the stock market is an attractive and complex part of the business world.
(30)

A. You can always make money.
B. You can tell exactly when the stock goes up or down.
C. You may sometimes lose money.
D. Your gambling is always safe.

查看答案

A．Because they wanted to build stores here.B．Because they thought the place was beauti

A. Because they wanted to build stores here.
Because they thought the place was beautiful.
C. Because they realized that it was a very good location for a seaport.
D. Because they wanted to have a war here.

查看答案

在关系SC中，查询学习课程号为′DB′，且成绩在60至90之间的学生学号的正确的 SQL命令是

A. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE DETWEEN 60 AND 90 B. SELECT SNO FROM SC WHERE CNO=′DB′OR GRADE BETWEEN 60 AND 90 C. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＞=60 AND 90 D. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＜=60 AND GRADE＞=90

组织的全员公关培洲即指对全员进行公关教育，其重点是【 】

A．To visit the city.B．To trade with foreigners.C．To build one of the busiest seaports.

A．Because they wanted to build stores here.B．Because they thought the place was beauti

A. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE DETWEEN 60 AND 90
B. SELECT SNO FROM SC WHERE CNO=′DB′OR GRADE BETWEEN 60 AND 90
C. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＞=60 AND 90
D. SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＜=60 AND GRADE＞=90

组织的全员公关培洲即指对全员进行公关教育，其重点是【】