MySQL

The data found that the CentOS 7 version removed the MySQL database software from the default program list and replaced it with MARIADB.There are two ways to solve this problem:Installing MARIADB[email protected] ~]# Yum install mariadb-server

Transferred from: https://tech.youzan.com/youzan-mysql-auto-ops-road/First, prefaceIn the Internet age, the scale of business is often exploding. Tasks such as fast instance delivery, database optimization, and backup management have higher demands

1. Connect to the database serverMysql-h host-uroot-pxxxx2. View all librariesshow databases;3. Select LibraryUse library name4. View the table below the libraryShow tables;5. Build a tableCREATE table msg (ID int auto_increment primary key,content

Mysql-uroot-prootMySQL5.7 mysql.user Table no password field changed authentication_string;One. Create a User:Command: CREATE USER ' username ' @ ' host ' identified by ' password ';Example: CREATE USER ' dog ' @ ' localhost ' identified by ' 123456

一、基本的sql语句CRUD Operations:Create Creation (ADD)Read ReadsUpdate modificationDelete Deletes1. Add DataINSERT into Info values (' p009 ', ' Zhang San ', 1, ' n001 ', ' 2016-8-30 12:9:8 ');Add data to a specific columnInsert into Info (code,name)

MySQL installation files are divided into two types, one in MSI format and one in ZIP format. If the MSI format can be directly clicked on the installation, according to the installation prompts it to install (I believe you can read English tips),

First, installation Preparationmysql-5.6.37-winx64 DownloadSecond, install MySQL1. Unzip Mysql-5.7.11-win32.zip to C:\mysql-5.7.11-win322. Set the environment variable Mysql_home=c:\mysql-5.7.11-win32, Path=%mysql_home%\bin3. The key step is to set

Depending on the MySQL storage engine, the supported locks are different.Myisam,memory, supports table-level locks.InnoDB, row-level and table-level locks are supported, and row-level locks are the default.Table-level lock to lock the entire table.

There are many ways to install it, and this is not a detailed introduction.Go to MySQL ConsoleMysql-uroot-pSee which libraries are availableshow databases;1. Create a libraryCreate DATABASE test1;2. Delete a libraryDrop database test1;3. Switching

========================== Business Vertical Segmentation:1 "Description:As the business scale expands, DBAs need to cut according to enterprise data business, vertical cutting is also called longitudinal cutting, vertical data cutting is based on

Main reference http://www.cnblogs.com/mr-wid/archive/2013/05/09/3068229.htmlMySQL most basic operation (command): one: Login MySQLMysql-u root-p Type the password and start with root;Second: View Existing Databasesshow databases;Three: Create, use

A scene demandMulti-source replication version 5.7, target host 5.6.21Some databases of 4 DB machines require a data summary for a linked table queryTwo to build1 export the corresponding destination

1. First Apache PHP MySQL installation package2. Create a new folder on the D-Disk for myphp20172. Parsing Apache installation package in myphp20173. Open Apache below the conf below the httpd.conf, for steps to modify① change the path of ServerRoot

Modify Table name Modification tableSyntax:ALTER table RENAME [to] ;Add FieldGrammar:ALTER table name ADD field name data type [Properties];modifying fieldsGrammar:ALTER Table name change original field name new field name data type

Backups are the last line of defense for data security, and for any scenario where data is lost, backups may not necessarily restore a single amount of data (depending on the backup cycle), but at least minimize the loss. There are two important

/* Create a database */ CREATE DATABASE ' MYbank ';/* CREATE TABLE */Use MYbank;CREATE TABLE ' Bank ' (' CustomerName ' CHAR (Ten), #用户名' Currentmoney ' DECIMAL (10,2) #当前余额);/* Insert Data */INSERT into ' Bank ' (' customerName ', '

Mysql connection query and Mysql connection # Data preparationDrop table if exists class;Create table class (Class_no int (2) unsigned zerofill primary key auto_increment comment 'class number ',Class_name varchar (30) not null comment 'class name');

MySQL-MMM solution, Reference: This article briefly introduces the mmm solution and provides a simple verification.I. MySQL-MMM solution 1. Introduction to MMM Solution MMM (Multi-Master Replication Manager for MySQL) is a set of script suites for

Mysql transaction, 1. What is a transaction?A transaction can be considered as a business logic Processing Unit. This unit is either executed or not executed;2 ACID principles:(1) Automicity)(2) Consistency)Account A has 3000 RMB, Account B is 2000

1449 and 1045 exceptions occurred when connecting to MySQL. Solution: mysql1449 How can I solve 1449 and 1045 exceptions when I connect to MySQL? Mysql 1449: The user specified as a definer ('root' @ '%') does not exist Solution Import the SQL