show databases

Show the existing database by showing Syntactic: Show DATABASES [like Wild] If you use the like wild section, the wild string can be a string that uses the SQL "%" and "_" wildcard characters. Features: Show databases lists the

MySQL master-slave synchronization and read/write separationDirectoryThe first part of the experimental environmentThe second part configures master-slave synchronizationThe third part configures read-write separationPart IV Test ValidationThe first

1) Prepare two MySQL services and start the service127.0.0.1:3306 Host127.0.0.1:3307 slave MachineBefore and after the master-slave configuration needs to confirm the two machine instances between the library, table, data consistent, otherwise it

MySQL Common Command Daquan1. mysql: Connect to the databaseMySQL commands the user to connect to the database. MySQL command format: mysql-h host address-u user name-P user Password1) Connect to MYSQL on this computer first open the DOS window,

Database is a long-term storage in the computer, organized and shareable data collection, in short, the database is a place to store data, only in its storage mode has a specific law, so that can facilitate the processing of data, database

Hot backup uses the mysqldump command for backup. This tool is a built-in MySQL backup and recovery tool with powerful functions. it can back up the entire database and back up multiple databases, you can back up a single table or several tables.

After mysql use db, it is very difficult to solve a mysql instance that you usually use. After using db, it is always very difficult to press Enter. It takes 1 s to return the result. I think there is something strange, I opened the general log and

MariaDB (MySQL) creation, deletion, selection, and data type Usage Details, mariadbmysql 1. Introduction to MariaDB (skipped in MySQL) The MariaDB database management system is a branch of MySQL and is mainly maintained by the open-source community.

Introduction of MARIADB (MySQL introduction skip) MARIADB database management System is a branch of MySQL, mainly by the open source community in the maintenance, the use of GPL licensed license MARIADB is fully compatible with MySQL, including

The various SQL statements are formally introduced from this section. This section describes SQL at the database level and related operations, viewing, building, and deleting. Show the existing database by showing Syntax: Show DATABASES [like Wild]

实现MySQL读写分离部署集群基础环境1 realizing MySQL read-write separation1.1 QuestionsThis case requires the configuration of 2 MySQL server +1 proxy Server, to achieve the MySQL agent read and write

################################################################################################To modify the firewall and host name:Virtual Machine Server0:Firewall-cmd--set-default-zone=trustedVim/etc/hostnameServer0.example.comVirtual Machine

About MMMMMM (MySQL master replication Manager) is a set of scripting programs that support dual-master failover and dual-master daily management. Mainly used to monitor and manage MySQL Master-master (dual master) replication, although it is called

1. IntroductionWhen using MySQL's replication mechanism to achieve master-slave synchronization, it was implemented by three threads, one I/O thread from the library, one I/O thread and one SQL thread. At configuration time, the main library needs

Two virtual machines, both fire and hostname modifiedThe firewall modifies the original----------public state---------to-------trusted stateVirtual Machine Server0:# Firewall-cmd--set-default-zone=trusted?# echo server0.example.com?>?/etc/hostname#

Two virtual machines, both fire and hostname modifiedVirtual Machine Server0:# Firewall-cmd--set-default-zone=trusted# echo server0.example.com >/etc/hostname# Cat/etc/hostnameVirtual Machine desktop0:# Firewall-cmd--set-default-zone=trusted# echo

Basic MySQL database operations 1. view all databases mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || mysql || performance_schema || wms |+-------------------

MySQL Security Configuration MySQL_Help_Link1. Security Policy 1.1 data security in the management sense To access a MySQL database, you must first access a certain permission of the database, that is, to log on as a user in a permission mode. Most

1. View all databases mysqlshowdatabases; + -------------------- + | Database | + -------------------- + | information_schema | mysql | perfo 1. View all databases mysql> show databases;+--------------------+| Database |+------------------

Backup policyFor different scenarios, we should develop different backup policies to back up databases. Generally, there are three backup policies:Copy database files directly using cp and tarCopy bin logs using mysqldumpLvm2 snapshot copy BIN