MySQL

Solution 1:This is a mechanism of MySQL itself:MySQL automatically disconnects the connection after more than 8 hours of idle timeThere are two solutions:1. Modify MySQL ConfigurationIncrease the value of the MySQL Wait_timeout property2, regular

MySQL uses the Sub-Library sub-table1 What is a sub-database table?Store data that was originally stored in a library on multiple libraries, storing data that was originally stored in a single table on multiple tables.2 Why do you want to divide the

MySQL version: 5.7.18Problem: When executing MySQL function load_file, the function loads the contents of the specified file and stores it in the corresponding field. Such as:Select Load_file ("D:\aa.txt");However, the execution always returns NULL.

There was this problem at the time of development today.Incorrect string value: ' \xe6\x97\xb7\xe5\x85\xa8 ' for column ' Sz_name ' at row 1Scene, inserting the Chinese parameter into the table in the MySQL database, throws this exceptionWhen I

CentOS7 under source installation MySQL 8.0.11 System environment: CENTOS7, kernel: Linux 3.10.0-862.el7.x86_64 If the old version of MySQL, first uninstall, use the following command to find out what the system is related to the

Business needs, inserting data into a table in bulk, using stored procedures to insertFirst, to create a MySQL table, indicating that for Phone_number, three fields, id self-increment, number is the table to be inserted, is_used means that it is

CentOS 6/redhat 6[mysql80-community]name=MySQL 8.0 Community Serverbaseurl=http://repo.mysql.com/yum/mysql-8.0-community/el/6/$basearch/enabled=1gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql[mysql57-community]name=MySQL 5.7 Community

Build MySQL master-slave replication installation Environment:Two CentOS 7 virtual machinesFirst, set up time synchronization environment, on the master node to build time synchronization Server master server Settings 1, install NTP[[email protected]

MySQL master-slave replication concept MySQL's built-in replication capabilities are the foundation for building large, high-performance applications. The distribution of MySQL data across multiple systems is done by copying data from one

1. Installation DependenciesYum install-y cmake Bison bison-devel libaio-devel gcc gcc-c++ git ncurses-develwget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.20.tar.gzwget

1. Adding and removing changes and checking operationInquire:SELECT * from table name where field name operator number/character;Modify:Update table name SET field name = value,... where field name operator number/characterDelete:Delete from table

1. Download the MySQL source installation package (Https://dev.mysql.com/downloads/mysql/5.7.html#downloads):# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.22-1.el7.x86_64.rpm　　2. Install the MySQL Source:# yum

MySQL group replication implements a multi-master update based on the replication protocol (single master mode).A replication group consists of multiple server members, and each server member in the group can perform transactions independently.

Based on point-in-time and location recoveryThe use of binary log can be implemented based on time and location recovery, for example, due to the deletion of a table by mistake, the full recovery is useless, because there is still error in the log,

The following conditions need to be met: Root Permissions GPC off (can use single quotes) have absolute path (read file can not, write file must) No configuration –secure-file-priv Drop TABLE IF EXISTS temp; Delete if temp

Today in the process of going to work, you need to import a 1.3G database SQL file into the MySQL database, in the execution of the process encountered some problems, execution to half times wrong, error is as followsERROR 2006 (HY000) at line

--Mysql stored procedure/*set @result = 0;create Procedure Login (--definition parameters, with in, out, inout three types in user varchar (ten), in pass varchar (ten), out result int) BEGIN DECLARE PASSD varchar (ten);--declare declares a temporary

MySQL comes with tool use introduction:1) MySQL command: MySQL command is the most used command tool, providing users with a command line interface to operate the server to manage MySQL.Command format:Usage:mysql [Options][database]Example: Mysql-e "

MySQL comes with tool use introduction:1) MySQL command: MySQL command is the most used command tool, providing users with a command line interface to operate the server to manage MySQL.Command format:Usage:mysql [Options][database]Example: Mysql-e "

MySQL default sort:https://forums.mysql.com/read.php?21,239471,239688#msg-239688 depend on order when order by is missing. Always specify order by if you want a particular order – in some situations the engine can eliminate the order by