Tag：Number of people
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Time：2021-2-22
Recently I saw a picture of SIR epidemic model posted on the Internet. Many people should not know much about this model. Let’s talk about this model today. This article is only about academic research, and does not discuss anything else. SIR model is one of the most classic models of infectious diseases. There are […]
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Time：2021-1-19
Sort query*Syntax: order by clause*Order by sort field 1, sort method 1, sort field 2, sort method 2 *Sort by: *ASC: ascending order, default. *Desc: descending order. *Note: *If there are multiple sorting conditions, the second condition will be judged only when the condition values of the current edge are the same. Aggregate function: a […]
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Time：2020-9-23
background Recently, websocket was used in the project, but a very strange problem was encountered, which was thrown when the application was started Failed to register @ServerEndpoint class Configuration class package com.smec.fin.config.websocket; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.socket.server.standard.ServerEndpointExporter; /** * @Description: * @author: wei.wang * @since: 2020/7/28 10:29 * @history: 1.2020/7/28 created by wei.wang */ […]
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Time：2020-8-23
Question:The number of employees whose salary is higher than the average wage of each department accounts for the total number of employees in the whole departmentpercentage Analysis: all the information here comes from the EMP table, and there is no need to do table join.Secondly, to add a new column of the average wage of […]
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Time：2020-8-16
This paper introduces the method of JSP using application to count the number of people online. Share with you for your reference. The specific implementation method is as follows: Copy codeThe code is as follows: <%@ page language=”java” import=”java.util.*” pageEncoding=”UTF-8″%> <% String path = request.getContextPath(); String basePath = request.getScheme()+”://”+request.getServerName()+”:”+request.getServerPort()+path+”/”; %> <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML […]
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Time：2020-8-10
9. Original table: courseid coursename score 1 Java 70 2 oracle 90 3 xml 40 4 jsp 30 5 servlet 80 In order to facilitate reading, the results of this table are as follows (pass score is 60) courseid coursename score mark 1 Java 70 pass 2 oracle 90 pass 3 xml 40 fail 4 […]
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Time：2020-7-13
Redoing of database comprehensive experiment Because at the end of the term, it was too hasty to do the database comprehensive experiment. It was good to use it in many places. After finishing, I suddenly thought of some methods that could be improved, so I’ll do it again during the winter vacation The title is […]
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Time：2020-7-11
TodoKit Todokit is a free high profile product requirements and bug management software, including MAC client and web version.Official website: https://www.todokit.vip Getting Started To use todokit, you need to download the latest version of the client or use the web version Login / registration After downloading the latest client or web version, users who are […]
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Time：2020-6-15
Dear ETM partner: ETM has gone through more than two years, In the 10th quarter, New mileage is coming. What kind of step has been taken? Come and have a lookETM weeklyCome on. project debriefing ETM-Core 01. ETM contract smart contract, 50% completed ETM-Module 01. Etm-pay, etm-id completed 95% 02. Node status management web tools […]
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Time：2020-5-31
Original address: https://www.cnblogs.com/aknife/p/11753854.html Chart to be used in recent projects But the project cannot be installed directly in the intranet by using the command Then I get a Vue project on the Internet Use firstnpm install echarts –saveinstall Then on the project node_ These two files will appear under modules Extract it to […]
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Time：2019-4-9
Several people gathered in Shanghai and Shenzhen to record the fourth bullet of the “Mesos/K8S/Swarm Romance of the Three Kingdoms of Containers”! The decimal number has been confused by the continuous dry goods. The practice of immersion technology in the ocean is still relatively small. Ctrip, as a big user of. Net, has taken the […]
