题目内容（请给出正确答案）

[主观题]

在语句SELECT [ALL|DISTINCT]中，DISTINCT是默认的。（）

此题为判断题(对，错)。

查看答案

如果结果不匹配，请联系老师获取答案

您可能会需要：

重置密码查看订单联系客服

安装优题宝APP，拍照搜题省时又省心！

更多“在语句SELECT [ALL|DISTINCT]中，DIST…”相关的问题

第1题

SELECT语句可以嵌套在其他许多语句中，这些嵌套的SELECT称为子查询。（）

此题为判断题(对，错)。

点击查看答案

第2题

LINQ语句的分组子句是（）

A.Where

B.Select

C.Join

D.Group

点击查看答案

第3题

DreamWeaver的Edit菜单中，将窗口中的所有内容全选的选项是？A. PasteB. ClearC. Select AllD.

DreamWeaver的Edit菜单中，将窗口中的所有内容全选的选项是？

A. Paste

B. Clear

C. Select All

D. Copy Text only

点击查看答案

第4题

拒绝用户Jean具有更改帐户表的权限，使用的SQL语句是（）

A.DENY SELECT FROM 帐户 ON Jean

B.DENY UPDATE ON 帐户 TO Jean

C.DENY INSERT INTO 帐户 ON Jean

D.DENY UPDATE FROM 帐户 ON Jean

点击查看答案

第5题

写出相应的SQL语句，以系统管理员身份登录，创建账号tom

以系统管理员身份登录，创建账号tom，设置tom的默认表空间为neuspace。为tom分配connect和resource系统角色，获取基本的系统权限。然后为tom分配对用户scott的表emp的select权限和对SALARY, MGR属性的update权限。

点击查看答案

第6题

关系数据库标准语言SQL的查询语句的一种形式为"selectA1，A2，…，AnfromR1，R2，…，RmwhereF”，其中sele

ct子句中和where子句可以分别实现关系代数中______。

A．投影、选择运算

B．选择、投影运算

C．并、交运算

D．交、并运算

点击查看答案

第7题

Parents and teenagers often disagree about the amount of freedom and responsibility that y

oung people are to have. The teenager often wants to be【21】to choose his own friends, select his own courses in school, plan for his own vocational【22】, and earn and spend his own money, and generally【23】his own life in a more independent fashion than .many parents are able to【24】.

Most problems between teenagers and their parents yield best to (导致) joint planning and decision making. Within any particular family【25】are avoided and problems are solved when all of the persons take【26】in the situation,【27】in working it out.【28】parents and young people learn how to get【29】well with each other and develop skills in understanding and【30】understood, even the most difficult problems are relieved.

(36)

A．free

B．likely

C．able

D．curious

点击查看答案

第8题

What do we mean by a perfect English pronunciation？ In one【56】there are as many different

kinds of English as there are speakers of it.【57】two speakers speak in exactly the same【58】.We can always hear differences【59】them, and the pronunciation of English【60】a great deal in different geographical【61】How do we decide what sort of English to use as a【62】？ This is not a question that can be【63】in the same way for all foreign learners of English.【64】you live in a part of the world【65】India, where there is a long【66】of speaking English for general communication purpose, you should select to【67】a good variety of the pronunciation of this area. It would be mistake in these【68】to use as a model BBC English or【69】of the sort. On the other hand, if you live in a country【70】there is no traditional【71】of English, you must take as your model some forms of【72】English pronunciation. It does not【73】very much which form. you choose. The most【74】way is to take as your model the sort of English you can【75】most often.

(56)

A．meaning

B．case

C．sense

D．situation

点击查看答案

第9题

Ⅲ. Cloze （30 points) Directions: For each blank in the following passage, there are fo

Ⅲ. Cloze (30 points)

Directions: For each blank in the following passage, there are four choices marked A, B, C and D. Choose the one that is most suitable and mark your answer by blackening the corresponding letter on the Answer Sheet.

Times have changed and the ideas of the young and the old about the same thing are often ill contra diction. For example, parents and teenagers often disagree about the amount of freedom and responsibility that young people (21) to have. The teenager is more independent and often wants to be (22) to choose his own friends, select his own courses in school, plan for his own vocational (23) , and earn and spend his own money, and generally (24) his own life in a more independent (25) than many parents are able to (26) .

Most problems (27) teenagers and their parents yield to (导致) (28) planning and decision making. Within ally particular family, (29) are avoided and problems are solved when all of the persons take (30) in the situation, and (31) in working it out. (32) parents and young people learn how to get (33) well with each other and develop skills in understanding and (34) understood, even (35) most difficult problems are relieved and a situation might appear that teenagers and their parents can some times see eye to eye.

21. A. is

B. should

C. will

D. are

点击查看答案

第10题

Internet-addicted job seekers may be partly the cause of the fact that it is taking the un

employed 23% longer to find a new position than it took during the last recession (经济萧条) , when the "benefits" of online job searching were unavailable. "A growing number of unemployed Americans waste time browsing(浏览) the estimated 4,000 to 5 ,000 online job sites, filling them with resumes, and then waiting for replies. It is common for long-time joblessness," argues Professor John A. Challenger. Although the Internet has the potential to be very useful for job seekers and it has become the primary tool for many, Challenger believes that it should be considered secondary to the traditional technique of meeting would be employers in person.

In addition to slowing job search efforts, the Internet is making the hiring process longer for the employer. In a survey of 5,000 hiring managers by an online resume site, 72% said that a majority of the resumes they received in response to an online job posting did not match the position's description.

"The more unrelated resumes managers have to go through in order to select the few to bring in for interviews, the longer it takes to fill the position," points out Challenger. " One result of this has been the increased use of screening software by employers. This will make it even more difficult for job seekers to get their resumes in front of the hiring executive for an interview. "

" All of this is not to say that the Internet has not revolutionized job hunting. It has certainly made it easier for someone in San Francisco, for example. , to search for job openings in Miami. In addition, the ability to conduct keyword searches has reduced the amount of time it takes to find the type of position a person is seeking. "

" Job seekers must learn how to use the Internet as a tool, rather than just relying on it as a means for submitting electronic resumes. " concludes Challenger.

According to the passage, the coming of online job searching brings______.

A．longer waiting time for the unemployed

B．longer computer technology training for the job seekers

C．more unemployment throughout the USA

D．more job opportunities in the Internet world

点击查看答案

第11题

在AUTOCAD系统中，使用ZOOM命令中的哪个选项与LIMITS命令的作用范围有关()

A.PRIVIOUS

B.CENTER

C.WINDOWS

D.ALL