文章整合

Mysql数据库-锁-学习笔记

锁是什么锁是计算机协调多个进程或线程并发访问某一资源的机制，用于管理对共享资源的并发访问表级锁表级锁，每次操作锁住整张表。锁定粒度大，发生锁冲突的概率最高，并发度最低。应用在MyISAM、 InnoDB等存储引擎中表锁表读锁语法：lock tables 表名 read; 表写锁语法：...
2022-07-07 06:28【白蝶丶】
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MySql数据库-索引-学习笔记

前言作者最近在学习数据库索引，故想通过写博客的方式记录学习情况，如有错误，敬请指出。一、索引简介 1.1索引是什么索引是一个单独的、存储在磁盘上的数据库结构，包含着对数据表里所有记录的引用指针。使用索引可以快速找出在某个或多个列中有一特定值的行，所有MySQL列类型都可以被索引，对相关列使用...
2022-07-07 06:28【白蝶丶】
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LeetCode每日一题(2316. Count Unreachable Pairs of Nodes in an Undirected Graph)

You are given an integer n. There is an undirected graph with n nodes, numbered from 0 to n 1. You are given a 2D integer array edges where edges i = ...
2022-07-07 06:28【wangjun861205】
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【SVN】SVN是什么？怎么使用？

文章目录 SVN是什么？ SVN 1 简单概念 21 当两个程序员修改同一文件时/同一行时？ 30 SVN和Git区别： SVNGit 36 CVS和SVN区别： CVSSVN 46 SVN比起CVS优点： SVNCVS 54 SVN的主要功能： SVN 78 SVN主要应用： SVN 100 S...
2022-07-07 06:28【宋丹敏】
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JWT certification used in DRF

Usage scenarios of common status codes Status code Use scenarios 200 Service request succeeded , And responded to the data , Modification is ...
2022-07-07 09:12【FOR. GET】
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Cesium does not support 4490 problem solution and cesium modified source code packaging scheme

Reference address Cesium Source code packaging reference link https://jercky.top/2020/12/10/Cesium%E5%85%A5%E9%97%A8 5/ %E6%89%93%E5%8C%85%E4%BD%B...
2022-07-07 09:12【FOR. GET】
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Record of structured interview

I just participated in a structured interview yesterday , The interviewees are all graduate students master 、 Doctor , I felt the difficulty of fi...
2022-07-07 09:13【FOR. GET】
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Data association between two interfaces of postman

scene ： Driver login account app, The driver grabs the bill After the driver logs in successfully , The server returns a token, The driver's requ...
2022-07-07 09:13【zhangyr0916】
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Postman setting environment variables

Method 1 ： ① Click on postman Left column Environments, Click the add button ; https://img blog.csdnimg.cn/20210901165227516.png?x oss process=image...
2022-07-07 09:13【zhangyr0916】
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Postman data driven

One 、 What is data driven The process of executing test cases , Essentially different data for execution , Different input and output proc...
2022-07-07 09:13【zhangyr0916】
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Pytest installation (command line installation)

Premise ： Installed python Environmental Science （ Use pip install ） System ：windows ①win+r, function cmd; https://img blog.csdnimg.cn/2021090621290...
2022-07-07 09:13【zhangyr0916】
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Pycharm importing third-party libraries

First step ： Click the file button https://img blog.csdnimg.cn/20210906160607650.png?x oss process=image/watermark,type ZHJvaWRzYW5zZmFsbGJhY2s,shad...
2022-07-07 09:13【zhangyr0916】
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Pycharm create a new file and add author information

① Click on the file Set up https://img blog.csdnimg.cn/20210906161522968.png?x oss process=image/watermark,type ZHJvaWRzYW5zZmFsbGJhY2s,shadow 50,t...
2022-07-07 09:13【zhangyr0916】
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Jemter operation

1.jemter Cannot directly link to the database , One needs to be installed first jmeter Connect mysql Database files mysql connector java 5.1.7 bin.jar...
2022-07-07 09:13【zhangyr0916】
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Leetcode daily questions (2316. count unreachable pairs of nodes in an undirected graph)

You are given an integer n. There is an undirected graph with n nodes, numbered from 0 to n 1. You are given a 2D integer array edges where edges i = ...
2022-07-07 09:14【wangjun861205】
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[SVN] what is SVN? How do you use it?

List of articles SVN What is it? ？ SVN 1 Simple concept 21 When two programmers modify the same file / On the same line ？ 30 SVN and Git differe...
2022-07-07 09:14【Songdanmin】
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Mysql database index study notes

Preface The author has been studying database indexing recently , So I want to write a blog to record my learning , If there is a mistake , Please...
2022-07-07 09:14【White butterfly】
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Mysql database lock learning notes

What is a lock A lock is a mechanism by which a computer coordinates multiple processes or threads to access a resource concurrently , Used to man...
2022-07-07 09:14【White butterfly】
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Mysql database transaction learning notes

Here's the catalog title Preface 1 What is the business 4 The nature of the transaction 9 Concurrent transaction problems 15 Transaction i...
2022-07-07 09:14【White butterfly】
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Error: selenium common. exceptions. WebDriverException: Messag‘geckodriver‘ execute

https://img blog.csdnimg.cn/c8b9372b6ac24b6288a7a1ae170d564a.png?x oss process=image/watermark,type d3F5LXplbmhlaQ,shadow 50,text Q1NETiBAemhhbmd5cjA...
2022-07-07 09:14【zhangyr0916】
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