MySQL

About MySQL1. What is a database?A database is a warehouse that organizes, stores, and manages data according to its structure, which is generated more than more than 60 years ago, with the development of information technology and markets,

MySQL config file under Windows is called My.ini, under the MySQL installation root directory;Under Linux is called MY.CNF, the file is located in/etc/my.cnf. Host ' 127.0.0.1 ' isn't allowed to connect to this MySQL server General reason:

A pre-configuration preparation1 Set environment variables (WIN7) firstWin10Two configuration ApacheI opened httpd.conf with EditPlus.LoadModule php5_module "C:/wamp/php/php5apache2_2.dll"DLL is lowercase ll is not uppercase II in editplus these two

The SQL statements are divided into:Use test: Represents a switch to the test database when executing SQL statements1. InsertSyntax: INSERT into table name (Field 1, Field 2,.......) VALUES (Value of field 1, Value of field 2,.....)Example:

"Contrast characteristics"Created November 27, 20161. Performance improvement2. Security improvements 1) SSL is turned on by default 2) no longer explicitly display user passwords 3) changes in Sql_mode3. Upgrade of the InnoDB storage engine 1) Do

Description: Requires 3 nodes, master node (202.207.178.6), slave node (202.207.178.7), test node (202.207.178.8), virtual address: 202.207.178.4. Configure the MySQL database master-slave replication, and use keepalived to achieve high availability,

Cd/homemkdir Servicemkdir Logmkdir confmkdir wwwMkdir-p/home/conf/nginxMkdir-p/home/conf/redisMkdir-p/home/conf/tomcatMkdir-p/home/log/nginxMkdir-p/home/log/redisMkdir-p/home/log/tomcat#以上是建立文件夹CD ServiceGroupadd MySQLUseradd-r-G MySQL MySQLTAR-ZXVF

1. What is a database?A database is a warehouse that organizes, stores, and manages data according to its structure, which is generated more than more than 60 years ago, with the development of information technology and markets, especially after

I. Introduction of DRBDDRBD Full Name distributed replicated block device, for distributed replication block devices, software-based implementations that do not share anything, replicate the way the disk is built to work in mirrored mode, similar to

CentOS can be installed via Yum:Yum-y Install httpd php php-mysql mysql-serverService httpd Status|start|stop|restart|reloadService Mysqld Status|start|stop|restart|reloadSite root directory/var/www/html/Apache Home Directory/etc/httpd/Apache Master

/************************************************************************* * CentOS 6.6 MySQL Install * Description: * Install MySQL database on VPS for some time boring use. * 2016-11-26 Shenzhen Nanshan Ping Shan village Zengjianfeng **************

Restore a database: mysql-h localhost-u root-p123456 wwwBacking up a database: mysqldump-h localhost-u root-p123456 www > d:\www2008-2-26.sqlWhere www is the database nameThe following is a test in the program$command = "Mysqldump–opt-h $dbhost-u

I. Introduction to the DatabaseWhat is a database?Data warehouses, such as: In an instance of ATM we create a DB directory called a databaseWhat is MySQL, Oracle, SQLite, Access, MS SQL Server, and more?They are database software, the main function

In the process of operating the website, you may encounter the problem of a sudden slow web site, in general, and MySQL slow relationship, you can open the slow query , to find the efficiency of SQL , and then take appropriate measures. Here's how

information_schema Database Table Description:schemata: Provides information for all databases in the current MySQL instance. This table is the result of show databases.TABLES: Provides information about the tables in the database, including views.

Scene:① because of the permission control, the remote database can not be accessed in the external network;② remote database connection and query relatively slow, affecting the efficiency;③ when the production is about to be released, verify that

MySQL index types and syntaxTo view all the indexes on a single table: Show index from table name;To build an index: Alter Table name Add index Normal index/unique unique index/fulltext full-text index/primary key primary key index + column

This article mainly introduces the basic methods of user and rights management in MySQL, including some common command statements that can be manipulated by various rights and operations, and is the basic knowledge of MySQL beginner learning, and

1.MySQL Login and logoutLogin MySQL: "Enter mysql-u account-p password which is loginMySQL exit: mysql > exit;Below is the example reference:Log in to MySQL: "Input mysql-uroot-p-p3306-h127.0.0.1"Indicates Superuser root, password is entered later,

start, stop, and uninstall of MySQL serviceRun at the Windows command prompt:Startup: net start MySQLSTOP: net stop MySQLUninstall: SC Delete MySQL650) this.width=650; "title=" 01.png "alt=" wkiom1g7l7krkfghaaajdwrmfda312.png-wh_50 "src=" http://s3.5