MySQL

What is information_schema in MySQLWhen you install or use MySQL, you will find a INFORMATION_SCHEMA database in addition to the database you have installed. Information_schema database is what to do with it, using WordPress blog friends may want to,

Every time you install a database, there is always such a problem, now recorded, for future reference ....the downloaded version of the-zip is uncompressed. Installation configuration tutorial Refer to Hongo Note Article-"MySQL-5.6.13 Decompression

MyISAM: The default MySQL plug-in storage engine, which is one of the most commonly used storage engines in the Web, data warehousing, and other application environments. Note that it is easy to change the default storage engine of the MySQL server

# Mysql-uroot-pEnter Password:ERROR 1045 (28000): Access denied for user ' root ' @ ' localhost ' (using Password:no)Use the Web-based method to modify the root user's password:# mysqladmin-uroot-p password ' newpassword 'Enter

View MySQL versionMysql-v192.168.60.166 Master192.168.60.167 from1. Install MySQL FirstApt-get Install Mysql-server2. Modify the configuration file of the master server/etc/mysql/my.cnfVim/etc/mysql/my.cnfRemove the following 2 lines of

Install MySQL: Note: Yum file configuration: To check the configuration file: Start: Service mysqld start Query table: Apache Installation Start: To view ports: Welcome interface: If the service is 4,000 times, it will be destroyed

See if there are any installation packages# yum List MySQLInstalling the MySQL Client# yum Install MySQL# Yum List Mysql-serverInstalling the MySQL server side# yum Install Mysql-serverThe MySQL service needs to be started after installation, we can

One, copy My.ini to MySQL extracted directoryExample: E:\MySQLSecond, modify the My.ini line 39th to 40thBasedir = "E:\\mysql"DataDir = "E:\\mysql\\data"Third, check whether the MySQL service is installed on the computerMy computer-with services and

The PDO extension defines a lightweight, consistent interface for the PHP Access database, which provides a data access abstraction layer,This allows you to execute queries and get data through consistent functions, regardless of the database you

https://tools.percona.com/Follow the prompts on the site to set up a total of 7 steps.# Generated by Percona Configuration Wizard (http://tools.percona.com/) version rel5-20120208# Configuration Name server-dev-binary-1009Generated for#**********@163

The use of InStr functions in MySQL INSTR (field name, String)This function returns the position of the string in the contents of a field, returns 0 if no string is found, or returns the position (starting at 1)SELECT * from Tbltopic

Master configuration:Code to copy code as followsLog-bin = Mysql-binServer-id = 1Binlog-do-db = Powerdns #要同步的数据库Master new Slave Account:Code to copy code as followsmysql> GRANT replication Slave on * * to ' slave ' @ ' 192.168.1.2 ' identified by '

MySQL can specify the Auto_increment property on the column when the table is created, and the IDENTITY property in SQL Server, and Oracle is implemented in sequence way. In MySQL, the system variable Auto_increment_increment,auto_increment_offset

After the installation of MySQL, if stored in Chinese, and then read out when the garbled problem occurs. There are hundreds of different character sets now, all defined by companies or organizations. We should use a character set that can hold all

1. Login and exit(1) LoginMysql–u User name –p passwordThis command password is clear textMysql–u User name –pEnter PasswordLog in at the same time indicate the host number:Mysql–h Host name –u user name –p passwordSpecify port number while logging

Method 1,Curdate (), Curtime (), now ()Method 2,Utc_date (), Utc_time (), Utc_datetime ();You can see that UTC time is 8 hours smaller than the eight area.AttentionFunctions that return their current date or time are evaluated once at the beginning

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MySQL appears when you delete a single tableERROR 1217 (23000): Cannot delete or update a parent ROW:A FOREIGN KEY constraint failsIt is possible that MySQL has set the Foreign Key association in InnoDB, which makes it impossible to update or delete

1, connected to MySQL format: mysql-h host address-u user name-p user password 1, connected to the local MySQL. First open the DOS window, then enter the directory Mysql\bin, and then type the command Mysql-u root-p, enter after the prompt you to

How does Mysql delete a temporary table starting with "# SQL -"? Author: skateTime: 2014/09/28 How does Mysql delete a temporary table starting with "# SQL -"? Phenomenon: after re-indexing, the disk space of the Mysql server is almost full. Run the