MySQL database master-slave configuration

This experiment requires 3 sets of centos6.5192.168.204.139 # "Master" MySQL192.168.204.138 # "from" MySQL192.168.294.129 #lamp websitePlease close the firewall for 3 machines, and SELinux# Turn off the firewall/etc/init.d/iptables stopChkconfig

Python crawler loops into MySQL database

1. Development environmentoperating system: Win10 python version: Python 3.5.2 mysql:5.5.532, the use of the moduleIf not, use Pip to install: Pip install xxx xxx need to install the module3, Analysis link (blog official website: https://www.cnblogs.

CREATE table in MySQL specify storage engine

CREATE TABLE Test (ID Int (TEN) unsigned NOT NULL auto_increment,Name varchar (ten) character set UTF8,Age Int (10),Primary KEY (ID))Engine=myisamCREATE TABLE Test (ID Int (TEN) unsigned NOT NULL auto_increment,Name varchar (ten) character set

MySQL alter usage, modify tables, fields, and other information

One: Modify table information1. Modify the table nameAlter Table to Sys_app;2. Modify Table AnnotationsAlter Table ' System Information Table ';Second: Modify field information1. modifying field types and annotationsAlter table sys_application

Linux CentOS6 mysql RPM installation

mysql rpm file: https://dev.mysql.com/downloads/mysql/Select operating System and version:Click on the 5.6 version linkUpload the downloaded file to the serverStart the installation below:Check to see if there is a MySQL package# Rpm-qa | Grep-i

Once Linux under uninstall install mysql-5.1.73 toss

Installation Preparation: Rpm-qa|grep-i MySQLCommand after knocking out a bunch of MySQL, a variety of installed MySQL package, what-java,-python and so on, a look at Meng!Play unbeaten spirit, first understand the situation, through the

The difference between MySQL storage engine MyISAM and InnoDB

Write in front MySQL , Oracle,sqlserver are all in the relational database, MySQL database is also known as one of the most widely used open source databases in the industry, and the plug-in storage engine is one of its most important features,

MySQL Basic operation

MySQL Basic operationfor an enterprise, the importance of data is beyond doubt. As an OPS personnel, must master the basic database operation, in order to facilitate later view, I have some simple database command to write out. View DatabaseMariaDB [

MySQL subquery GROUP by usage

1 GROUP by indicates a sort, followed by the first data in each group, where the condition is indicated, if you need conditional filtering on the order, you should follow the property name with a + condition. and cannot use where2 aggregate function

Lamp architecture Introduction, MYSQL,MARIADB Introduction, MySQL Installation

Lamp Architecture IntroductionLamp refers to L (Linux), A (Apache), M (MySQL), P (PHP), apache+php need to be in a host, MySQL can be separate or run on the same host.The operating modes are as follows:650) this.width=650; "Src="

Install Jdk,tomcat and MySQL under Linux

Environment: centOS6.8, jdk1.8,tomcat-8.5.15,mysql-5.7.18 1. Installing the JDKNote:rpm and software-related commands are equivalent to software Assistant management software under windowsSteps:  1) View current Linux whether the system has been

MySQL Installation and management

Mysql:https://www.mysql.com/downloads/for all platformsFirst, start the MySQL service on Windows1. Service Name viewing method: Win+r input Services.msc2. Run cmd as AdministratorStart service: net start mysql57Stop service: net stop mysql57Second,

Yum installs MySQL automatically

1. Install client and server sideView CentOS comes with MySQL:Yum List Installed | grep MySQLUninstalling the CentOS system with the MySQL database?Yum-y Remove mysql-libs.x86_64Install the MySQL client and server:Yum-y install mysql-server MySQL

Django-mysql Database Usage 01

Django Connection Database requirements: 1) pycharm run the Django platform; 2) MySQL database. The premise of this article is that all two platform readers have been installed correctly, not installed friends please Baidu. The Django I used is

MySQL error code 1452: Foreign key What's wrong (good long no longer repeat English haha ha)

I see a lot of the same solution here, okay, all the same, here's an article from the Linux commune. Http://www.linuxidc.com/Linux/2012-10/71821.htm, as for my own solution, I first clear the data index, and then delete the record, this time should

Java link MySQL

1. First install MySQL, add the bin directory to the PATH environment variable2. Modify the SQL login name to 123456.update mysql.user set Authentication_string=password (' 123456 ') where user= ' root '3.mysql download mysql-connector-java-5.1.44,

(1) MySQL Overview

I. Relational databaseDatabase (database) is a place where user data is stored, and when users access and manipulate data in the database, they need a db Management System,dbmsThese two parts, together with the application tool, are commonly

MySQL Java database

Any project can not be separated from the data, but for the storage of data and other operations, it will use the database.Here is the main operation for the MySQL database.1. SoftwareOf course, first of all to download MySQL, in order to operate

MySQL notes (1)

First, the database operation1. View the databaseShow databases2. Create a databaseCreate Database Kameng;3. Enter the databaseUse Kameng;4. Deleting a databaseDrop database Kameng;Second, table operation:1. View the tableShow tables;2. Create a

MySQL series 8.mysql high Availability (keepalived)

Environment : centos6.5_x64Prepare :two sets of MySQL MachineMain 1 master:192.168.32.130Main 2 backup:192.168.32.131vip:192.168.32.100Steps :1. Configure MySQL 's dual-master architecture2. Installing keepalivedkeepalived-1.2.23.tar.gzYum-y Install

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