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一文彻底搞懂MySQL基础：B树和B+树的区别 转载 https://blog.csdn.net/a519640026/article/details/106940115?spm=1001.2014.3001.5502
写在前面 大家在面试的时候，肯定都会被问到MySql的知识，以下是面试场景：面试官：对于MySQL，你对他索引原理了解吗？我：了解面试官：MySQL的索引是用什么数据机构的？我：B+树面试官：为什么要用B+树，而不是B树？我：…面试官：用B+树作为MySql的索引结构，用什么好处？我：… B树和B+ ......
麒麟V10服务器安装MySQL报错file /etc/my.cnf from install of mysql-community-server-8.0.33-1.el7.x86_64 conflicts with file from package mariadb-common-3:10.3.9-9.p02.ky10.x86_64
1.问题描述 具体地说，"/etc/my.cnf" 文件与 "mysql-community-server-8.0.33-1.el7.x86_64" 包中的文件发生冲突，并与 "mariadb-common-3:10.3.9-9.p02.ky10.x86_64" 包中的文件相冲突。 这种冲突是由于系 ......
Error response from daemon: remount xxxxxx/var/lib/rabbitmq/.erlang.cookie, flags: 0x44000: invalid argument 问题解决
docker cp 的时候报错 Error response from daemon: remount /var/lib/docker/overlay2/1de5d96d9ed06c75a1125d713001c2b54f76e276a4b877cc09bb9df97363e6a1/merged/v ......
Can't import the named export XXXX from non EcmaScript module (only default export is available)的解决方法
# 解决方法： 1. https://stackoverflow.com/questions/69343038/cant-import-the-named-export-xxxx-from-non-ecmascript-module-only-default-expo 2. https://gith ......
HEAD detached from XXXX解决方法 HEAD detached at origin/master 问题的解决
如果是因为在这个分支下操作，出现了了问题的，请尝试以下办法 remotes/origin/HEAD -> origin/master 1.git push origin master后出现 Everything up-to-date 当时以为问题自己点错了，又重新提交了一次，在 git commit ......
Variable 'xxxx' is accessed from within inner class, needs to be final or effectively final-Lambda 表达式的变量与作用域
#### 问题的原因 问题代码： ``` public static void main(String[] args) { Integer sum = 0; Integer count = 0; List list = new ArrayList(Arrays.asList(1,2,3,4,5)); ......
ERROR in static/js/*** from UglifyJs Unexpected token: punc (,) [./~/@vant/popperjs/dist/index.esm.mjs:71,0][static/js/app.647c4df1bc08fccb4c0d.js:685,9]
今天打包的时候发现这样的问题，解决方式： 找到webpack.base.conf.js文件，加入下边的代码： { test: /\.mjs$/, loader: "babel-loader", include: [resolve("node_modules/@vant/popperjs/dist/i ......
Cross-thread operation not valid: Control 'txtMessage' accessed from a thread other than the thread it was created on.
Winform TextBox Cross-thread operation not valid: Control 'txtMessage' accessed from a thread other than the thread it was created on. (330条消息) 解决Cros ......
【847】create geoDataFrame from dataframe
Ref: From WKT format Firstly, we already have a dataframe, and there is a column of geometry. But this column is in the format of the string, therefor ......
ERROR 3529 (HY000): Cannot load component from specified URN....
这里介绍、演示一下，安装validate_password组件时遇到ERROR 3529 (HY000): Cannot load component from specified URN: 'file://component_validate_password'错误的原因 当前测试的环境为MySQ ......
ErrorCode17410(No more data to read from socket)错误
系统运行的过程中莫名其妙出现ErrorCode17410(No more data to read from socket)错误，只是某一个功能的sql执行出现，但是把sql语句复制到plsql执行又没问题，后面尝试对数据库的进程都清理就好了，应该是进程占用出了问题，具体命令如下 ```sh ps ......
MySqlException(0x80004005) Reading from the stream has failed 远程主机强迫关闭了一个现有的连接
不同客户端电脑连接服务器数据库，通过navicat管理工具可以正常连上，但是通过程序连接提示MySqlException(0x80004005) Reading from the stream has failed 远程主机强迫关闭了一个现有的连接(注意:部分电脑通过程序也是可以正常连接服务器数据库 ......
docker报错：Error response from daemon: driver failed programming external connectivity on endpoint likeshop-nginx
重启docker-compose时，nginx服务报错。 报错信息： Error response from daemon: driver failed programming external connectivity on endpoint likeshop-nginx (f0a809481f5 ......
Authentication to host '10.167.32.123' for user 'root' using method 'mysql_native_password' failed with message: Reading from the stream has failed
连接Mysql5.7以上的版本的数据库出现报错： C#连接远程连接mysql时，抛异常：Authentication to host '10.167.32.123' for user 'root' using method 'mysql_native_password' failed with me ......
java: Annotation processing is not supported for module cycles....Please ensure that all modules from cycle [ssm-demo-mgt-common,ssm-demo-mgt-task] are excluded from annotation processing
报错内容： java: Annotation processing is not supported for module cycles.Please ensure that all modules from cycle [ssm-demo-mgt-common,ssm-demo-mgt-task] ......
LEARNING TO SAMPLE WITH LOCAL AND GLOBAL CONTEXTS FROM EXPERIENCE REPLAY BUFFERS
 **发表时间：**2021（ICLR 2021） **文章要点：**这篇文章想说，之前的experience r ......
论文阅读 | Soteria: Provable Defense against Privacy Leakage in Federated Learning from Representation Perspective
Soteria:基于表示的联邦学习中可证明的隐私泄露防御https://ieeexplore.ieee.org/document/9578192 # 3 FL隐私泄露的根本原因 ## 3.1 FL中的表示层信息泄露 **问题设置** 在FL中，有多个设备和一个中央服务器。服务器协调FL进程，其中每个 ......
Remove Duplicates from Sorted List
Given the head of a sorted linked list, delete all duplicates such that each element appears only once. Return the linked list sorted as well. **Examp ......
2023-06-20 hexo博客 运行报错：Cannot find module 'hexo' from 'D:\ablog' 提示要rm -rf node_modules && npm install --force
前言：把博客拉到到新电脑，运行hexo s报错如下： PS D:\ablog> hexo s ERROR Cannot find module 'hexo' from 'D:\ablog' ERROR Local hexo loading failed in D:\ablog ERROR Try r ......
maven构建报错：Unable to load the mojo 'install' (or one of its required components) from the plugin 'org.apache.maven.plugins:maven-install-plugin:2.4'
项目在执行maven clean install时，报错： Failed to execute goal org.apache.maven.plugins:maven-install-plugin:2.4:install (default-install) on project sby-compon ......
git pull https Received HTTP code 504 from proxy after CONNECT
我们在服务器上面git pull codehub代码的时候会遇到Received HTTP code 504 from proxy after CONNECT，这个报错多数是因为代理配置的问题。 从以下两个方向进行排查： 1. 确认服务器/虚拟机是否配置了全局代理。 检查/etc/profile中是 ......
关于ASP.NET.CORE中的Failed to read parameter "string param" from the request body as JSON的处理
先上报错信息 Microsoft.AspNetCore.Http.BadHttpRequestException: Failed to read parameter "string param" from the request body as JSON. > System.Text.Json.Js ......
C++ multi process share value via write and read data from serialized file,the better way is shared_memory,pipeline,message queue,socket
#include <atomic> #include <chrono> #include <cmath> #include <condition_variable> #include <cstddef> #include <forward_list> #include <fstream> #incl ......
redis提示Could not get a resource from the pool（jedis连接池配置）
https://www.cnblogs.com/qlong8807/p/5149007.html 起初在JedisPool中配置了50个活动连接，但是程序还是经常报错：Could not get a resource from the pool 连接池刚开始是这样配置的： JedisPoolConf ......
solve the problem of downloading assets from github
Description After version 2021a, in order to reduce the file size, Webots set resource files such as textures and sounds up for network download by gi ......
Remove Duplicates from Sorted Array
**Example 1:** ``` Input: nums = [1,1,2] Output: 2, nums = [1,2,_] Explanation: Your function should return k = 2, with the first two elements of nums ......
已解决 DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop workingfrom collections import Iterable
场景描述 E:/worksp_py/hardwary/100day/twentyfive/itertor.py:4: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collect ......
English Learning Articles 2022-06-11 Your teen wants to get in shape this summer? What to say and when to worry
Your teen wants to get in shape this summer? What to say and when to worry | CNN If your children say they want to start exercising or working out mor ......
English Learning Articles 2023-06-08 Multiple insomnia symptoms raise stroke risk in people under 50, study says
Multiple insomnia symptoms raise stroke risk in people under 50, study says If you have trouble falling asleep or staying asleep, wake up too early mo ......