MySQL

A[Client]Port = 3306Socket =/tmp/mysql.sock[Mysqld]Port = 3306Socket =/tmp/mysql.sockBasedir =/usr/local/mysqlDataDir =/data/mysqlPid-file =/data/mysql/mysql.piduser = MySQLBind-address = 0.0.0.0Server-id = 1 #表示是本机的序号为1, which is generally the

NS10.1 virtual machine version for MySQL database load performanceNote: Performance loss is minimal when performing MySQL database load performance on the NS12 version kernel. The data tested here is for the NS10.1 virtual machine version

When the remote connection to MySQL, the connection is not up, the following error occurred:Lost connection to MySQL server @ ' Waiting for initial communication packet ', System error:0Cause Analysis:MySQL turns on the DNS reverse resolution

MySQL master-slave instructions synchronization problem Mysqldump: This tool is suitable for databases below 10G or several tablesPercona-xtrabackup Backup tool: For 100g-500gLVM Snapshots: Larger data volumes, or sub-database tables

1th Chapter  mysql User Management:1.1  user's definition:   user name + host domain   mysql> select user,host,password  from mysql.user;+------+-----------+----------+| user | host       | password |+------+-----------+----------+| root | localhost 

1. Reasons for a long-time executed queryLong-time queries due to poor SQL execution efficiency:Long queries caused by SQL injection:Because DDL statements cause table metadata lock waits:2. Problems caused by long-time queriesIn general, queries

MySQL database Advanced (iv)--stored procedure one, introduction to Stored Procedures 1, Introduction to Stored ProceduresA stored procedure is a set of programmable functions that have a specific set of SQL statements that are compiled and saved in

Recently, when using MySQL, there was a strange problem with garbled characters, and I started to see that there were some problems with the MySQL character set. Modified configuration file/etc/my.cnf

MySQL Cluster Introduction???? MySQL cluster is a complete distributed database system based on the NDB cluster storage engine. Not only high availability, but also automatic segmentation of data, redundant data and other advanced features. Unlike

General Idea:MySQL does not have a convenient statistical function like Oracle, can only rely on their own hard computing: through the Time field directly increase the year, the month, and then through the left join associated Time field to

I. MySQL database introduction 1, Database basic knowledge MySQL is an open-source relational database management system (RDBMS) that uses the most common database management language – Structured Query Language (SQL) for database

MySQL optimization three major directions① optimizes the server kernel where MySQL is located (this optimization is typically done by operations personnel).② tuning MySQL configuration parameters (my.cnf) This optimization requires a stress test to

First, create a regular user and authorize 1, create a user and authorize[Email protected] ~]# mysql-uroot-pEnter Password:Welcome to the MySQL Monitor. Commands End With; or \g.Your MySQL Connection ID is 1Server version:5.6.36 MySQL Community

MySQL User managementA new user who creates a specified IP can access some of the MySQL library's tables. All tables for all libraries, if you want to specify access to certain tables of a library, you only need to modify the nameUser1 specified

Linux Environment MySQL report table ' xxx ' doesn ' t exist error resolutionProblem: The program reported the error of table ' xxx ' doesn ' t exist, but the view database found that the table already exists and the letters are not misspelled.Cause:

1. Set the Servie-id value of main Library master and turn on Bin-log function parameterVi/etc/my.cnfTo modify the parameters of the MY.CNF:[Mysqld]Server-id=1 //Each library must have a different Server-idLog-bin=mysql-bin2. Check that the

Find some information on the Internet, record the following and add your own understanding. When designing the relational database, we should design a reasonable relational database to conform to different specifications, and the different

Today in Linux in the installation of MySQL, after the installation is not open, Baidu to find reasons, tried a lot of ways to finally solve.MySQL Installation:[[email protected] usr]# yum install MySQLUnable to start normally:The query is indeed

Data add and delete change to insert data1. 插入完整数据（顺序插入） 语法一： INSERT INTO 表名(字段1,字段2,字段3…字段n) VALUES(值1,值2,值3…值n); 语法二： INSERT INTO 表名 VALUES (值1,值2,值3…值n);2. 指定字段插入数据 语法： INSERT INTO 表名(字段1,字段2,字段3…) VALUES (值1,值2,值3…);3. 插入多条记录

One, partition operation 1. To change a table without partitions to a partitioned tableALTER TABLE trb3 PARTITION BY KEY(id) PARTITIONS 2;2. Deleting a partition# 删除所有分区, 同时数据丢失ALTER TABLE es2 REMOVE PARTITIONING;# 删除指定分区, 数据丢失ALTER TABLE tr DROP