primary data是主要数据，secondary data是次要数据。用Primary data举例子：separate the primary data and indices to that data.他们的解决方案是把主要数据和这些数据的索引分离开来。The Node object is the primary data type for the entire DOM.节点对象是整个DOM中最主要的数据类型。用Secondary da...
一手数据（Primary data）：也称原始数据。指通过人员访谈、询问、问卷、测定等方式直截获得的，时效性和相关性更好。二手数据（Secondary data）：利用文献，统计年报以及数据库等前人统计好的数据资料。优点是获取成本低，且现成可用。一般可以长时间保存，生成数据趋势图方便。一手数据提能够提供量身定制的...
Primary and Secondary data-主要和次要数据 【知识点】 Primary and Secondary data-主要和次要数据 Primary and Secondary data-主要和次要数据 Primary dataare data collected especially/particularly for a specific purpose. Secondary dataare data which have already been collected elsewhere, for some other purp...
4、With a secondary data source, users cannot save the data they enter into the form to use offline.使用辅助数据源，用户无法保存他们在表单中输入的数据以便脱机使用。
When to use primary vs. secondary sources Primary and secondary sources fulfill different needs. We touched on these different purposes earlier, but here’s the rest of the explanation: When you’re making a clear assertion of fact or presenting a theory or argument you’ve developed, you need...
M y subject is data analysis at three levels. Primary analysis is the original analysis of data in a research study. It is what one typically imagines as the application of statistical methods. Secondary analysis is the re-analysis of data for the purpose of answering the original research que...
The primary market is where governments and businesses offer new securities for the first time. After securities have been issued, buyers and sellers trade them in secondary markets.
(3) the secondary log shipping primary and secondary databases have the same database name. Important:If a given server instance that hosts a secondary replica for the availability group does not also host a secondary database for the log shipping configuration, you will...
TextColor、TextColorPrimary和TextColorSecondary是用于定义文本颜色的属性。 1. TextColor:指定文本的主要颜色。它用于设置文本的前景色,以确保文本...
Using redis streams to keep your primary database in sync with secondary datastores (e.g. elasticsearch). Installation First, install redis. Then, add this line to your application's Gemfile: gem 'redstream' And then execute: $ bundle Or install it yourself as: $ gem install redstream ...