1、Industry documents were analysed alongside primary and secondary data on the tobacco industry in South Korea.对韩国的烟草业文件进行了分析，同时，对关于烟草业的主要数据和次级数据进行了分析。2、Secondary data refers to previously collected data from internal and external sources.中级的数据...
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...
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 purpose, but which can be used or adapted for the surv...
Today’scoursestructures:Firstclass:taughtcourseDatasources:1.Secondarydata2.PrimarydataSecondclass:discussingwithyouaboutyourresearchtopicandresearchproblems(questions)2 Lecture5Datasources Purposeofthischapter:a.Thedefinitionofsecondaryandprimary datab.Whatwemeanbydatacollectionc.Whatthesourcesofdatacollectiond...
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...
Secondary research should always be one of the three components of data you use: Secondary, Primary, Internal. It’s an affordable and timely way to understand your market at a high level. While it provides a good ‘lay of the land’ perspective, secondary research rarely provides you the ...
A primary source is a firsthand account of an event that happened, data from a study, or an original work. Here are some examples of primary sources: Photographs of historical events News articles Novels and short stories Autobiographies by historical or famous people ...
Primary Data THE TOPIC:Primaryresearch is any type of research that we go out and collect ourselves. Examples include surveys‚ interviews and observations. In other words information that has been collected at first hand is calledprimaryresearch. It involves measurement of some sort‚ whether by...
[ @primary_database = ] 'primary_database' 主服务器中的数据库的名称。primary_database 的数据类型为 sysname,无默认值。 [ @secondary_server = ] 'secondary_server', 辅助服务器的名称。secondary_server 的数据类型为 sysname,无默认值。 [ @secondary_database = ] 'secondary_database' 辅助数据库...
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 ...