问题 填空题

根据对数据源操作方式和结果的不同,查询可以分为5类:选择查询、交叉表查询、 、操作查询和SQL查询。

答案

参考答案:参数查询

解析:知识点:查询的基本操作/查询分类
评析:根据对数据源操作方式和结果的不同,查询可以分为5类:选择查询、交叉表查询、参数查询、操作查询和SQL查询。
选择查询是Access数据库中最常见的查询类型,它是根据指定的查询准则,从一个或多个表中获取数据并显示结果。也可以使用选择查询对记录进行分组,并且对记录进行总计、计数、平均以及其他类型的计算。
交叉表查询将来源于某个表中的字段进行分组,一组列在数据表的左侧,一组列在数据表的上部,然后在数据表行与列的交叉处显示表中某个字段统计值。
参数查询是一种利用对话框来提示用户输入准则的查询。
操作查询与选择查询相似,都是由用户指定查找记录的条件,但选择查询是检查符合特定条件的一组记录,而操作查询是在一次查询操作中对所得结果进行编辑等操作。
SQL查询就是用户使用SQL语句来创建的一种查询。

单项选择题

Internet shopping is a new way of shopping. Nowadays, you can shop for just about anything from your armchair. All you need is a computer which is linked to the Internet. Shopping on the Internet is becoming increasingly popular. In the United States, people spent over US $2.5 billion on Internet shopping in 1998. This figure is expected to reach US $11 billion by the year 2004.

People can shop for a variety of products on the Internet. Physical products include items such as books, CDs, clothes and food. These types of products are the most common purchases through the Internet. You can also buy information products such as on-line news or magazine stories, or you can download computer software through the Internet. Services such as booking airline tickets, reserving hotels or renting cars are also available on the Internet. You can also go shopping on the Internet for entertainment services and take part in on-line games.

Internet shopping offers a number of benefits for the shopper. The most important advantage is convenience. You can shop when you like as the on-line shops are open 24 hours a day and you don’t have to queue with other shoppers at the checkout counters. Secondly, it is easy to find what you are looking for on the Internet. Even out-of-print books may be ordered on line. Finally, it is often cheaper to buy goods through the Internet, and you can tell the shop exactly what you want.

The main disadvantage of Internet shopping is that you cannot actually see the products you are buying or check their quality. Also, many people enjoy shopping in the city and miss the opportunity to talk to friends. Some people are worried about paying for goods using credit cards, so Internet companies are now finding ways to make on-line payment safe.

Internet shopping is sure to become more and more popular in the years ahead. It promises to change the way we buy all kinds of things—from tonight’s dinner to a new car.

The fifth paragraph is mainly about ().

A. people’s enjoyment of a new way of shopping

B. Internet companies’ finding of a new way for payment

C. there being various problems with Internet shopping

D. serious disadvantages of Internet shopping

单项选择题