首页/ 题库 / [单选题]在关系数据库系统中,为了简化用户的查询操的答案

在关系数据库系统中,为了简化用户的查询操作,而又不增加数据的存储空间,常用的方法是创建_______。

单选题
2021-09-02 11:53
A、另一个表
B、游标
C、视图
D、索引
查看答案

正确答案
C

试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

在关系数据库系统中,为了简化用户的查询操作,而又不增加数据的存储空间,常用的方法是创建()。
如果分别以检索词a、b、c在某数据库的关键词字段进行检索,检索式a or b and c得到检索结果数量最少。
在关系数据库系统中,为了简化用户的查询操作,而又不增加数据的存储空间,常用的方法是创建_______。
Logistic回归系数与优势比OR的关系为()。
在应用ORS液的过程中,错误的做法是()
在应用ORS液的过程中,错误的作法是()
在应用ORS液的过程中,错误的是()
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
万方数据库使用布尔逻辑算符anD./or/not.其中A.anD.B表示()。
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
广告位招租WX:84302438

免费的网站请分享给朋友吧