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You should know that the biggest feature of mysql is master-slave replication compared with other databases, but the version before 5.7 only supports one master-slave replication at most. For some statistical classes, it needs to cross-database. This is a troublesome thing. In the past, only database middleware (mycat, etc.) can do this kind of ...

install Mysql installationhttp://ftp.ntu.edu.tw/MySQL/Downloads/MySQLInstaller/Version: mysql-installer-community-5.7.17.0.msiVisual Interface Tool: MySQL-Front_V5.4.4.153_SetupInstallation tutorial: http://jingyan.baidu.com/article/363872ec2e27076e4ba16fc3.htmlAbout passwords: admin/admin root/adminhttp://www.jb51.net/article/71888.htmhttp://b ...

When a large system is set up, it will be found that many SQL operations overlap, and individual calculations are the same, for example, in a business system, how a single sheet is calculated.When these situations arise, using stored procedures is a great optimization. This series: demo download (1) MySQL Optimized Notes (1) - Basic op ...

Thing: Things are a logical set of operations in which the units that make up the set of operations either succeed or fail entirely In short, a set of operations either succeeds or fails; one thing has n components or n components succeed at the same time or n components fail at the same time. mysql transaction 1) Default transaction: ...

target Create a PV in your environment Create a Deployment for MySQl Exposing MySQL to other pod s in the cluster by DNS name Before the beginning You need a Kubernetes cluster, a kubectl command-line tool that can connect to the cluster. If you don't have a cluster, you can use Minikube To create. We will create a PV (Persistent Volume) for ...

Overview of select statement There are three common functions of keyword select ion in query statements: single-table query, multi-table join query and sub-query. All the following introductions are about manipulating this table create table tml //Main table, two fields, ID (primary key self-increasing) and name (non-empty) ...

Wallpaper. jpg Hello everyone! Yes, I have issued a "pseudo" tutorial. Originally this article was originally called "Django database table operation summary: based on Django 1.11.1", but I changed it because Django has done all that we should do. We don't need to think about dealing with the database itself at all. When I ...

(iv) Focus on Wechat Public Number: [Taro Back-end Cabin] Welfare: RocketMQ/MyCAT/Sharing-JDBC All Source Analysis Articles List RocketMQ/MyCAT/Sharing-JDBC Chinese Annotation Source GitHub Address Every message you leave about the source code will be answered carefully. Even if you don't know how to read the source code, you can ask. New so ...

3. Implement HA-LAMP combination based on heartbeat v2 crm; Require that wordpress be deployed, and any data in the edited articles can be accessed normally after node switching; Introduce networking: All devices use CentOS 6.8 operating system Two servers are configured with LAMP, IP addresses 192.168.255.128 and 192.168.255.129 V ...

Chapter 1 Database Classification 1. Relational database There are many two-dimensional tables in the database, one table, two tables, three tables, one hundred tables and so on. There may be associations between multiple tables. 2. Non-relational databases Includes multiple database services (multi-instance) 3306/3307/3307. Each databas ...