MySQL disables auto-commit settings,Add the following sentence to the My.ini fileinit_connect= ' SET autocommit=0 'But there is a problem, the root user of the autocommit variable query, this value is still 1, that is, also automatically committedA
MySQL database root user has all the library, the table of all permissions, frequent use of the root user will bring great risk to the database, so should establish some low-privileged users, only responsible for a portion of the Library, table
1) System Environment descriptionMYSQL 5.5 Master-slave node127.0.0.1:3306 main node, manual stop service for verifying master-slave switching effect127.0.0.1:3307 from Junction 1127.0.0.1:338 from Node 2, in order to verify the master-slave
Schema and data type optimization1. Select the optimized data type1). Smaller is usually better: smaller data types are usually faster because they consume less disk, memory, and CPU cache, and processing requires less CPU cycles.2). Simple: Simple
1: Inserting data ImportMySQLdb#Create a connected variableconn = MySQLdb.connect (host='127.0.0.1', user='Root', passwd='123456', db='MySQL')#Open Connection ChannelCur =conn.cursor ()#execute the EXECUTE statement, insert into a piece of
Set the MySQL service to allow extranet access, modify the MySQL configuration file, some my.ini, some my.cnf "Linux".1: Setting up the MySQL configuration file/etc/mysql/my.cnfFind Bind-address =127.0.0.1 to comment out;//function is to make it no
Here is the configuration of MySQL, which is carried out at the time of installation, please check first: Install MySQL under Windows platformImmediately above, after the installation completes the configuration option tick, press "Finish", the
Linux installation MySQL diagram (transferred from Baidu Experience)
1 Find out if MySQL was previously installed, use the following command:Rpm-qa|grep-i MySQLIf the following package is displayed, the MySQL is
The slow query log feature is not turned on by default, and it records a value that executes longer than the parameter Long_query_time (default is 10) and the number of rows accessed exceeds the SQL statement that the parameter
L Installation Configuration:SlightlyL Machine Distribution
Ip
Role
Use
192.168.15.3
Master
Main Library
192.168.15.4
Slave1
Standby Library
192.168.15.5
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Ununtu installation of MySQL requires three instructions:1. Directive IDuring execution, you will be prompted to enter your password and repeat the password (enter the password directly), as shown in Figure 1, Figure 2Figure 1:Figure 22. Directive
Use thinkphp (3.2.3) to manipulate the database, first to connect to the database. We need to write a configuration file for a database, and thinkphp will automatically connect to the database based on the configuration file. The model file is not
The Mysqladmin command is used to modify the user password.mysqladmin command format: Mysqladmin-u user Name----old password password new password1) Add a password to root ab12First enter directory Mysql\bin under DOS, and then type the following
MySQL installation files are divided into two types, one in MSI format and one in ZIP format.After the installation in MSI format, do not be busy to start MySQL, we also need to modify the configuration file (if not configured, after the start of
Mysql events (scheduled tasks) and mysql event tasks1. What is an event?
A set of SQL sets used to execute scheduled tasks. Similar to triggers, they are passively executed. Events are triggered when the time is reached, and triggers are executed
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