MySQL

MySQL Master Copy Build1. Build1.1 MasterMaster configuration (MY.CNF)[mysqld] log-bin=/usr/local/mysql-5.6.16/log/mysql-binserver_id=1Start Master./bin/mysqld_safe--defaults-file=/usr/local/mysql-5.6. /my.cnf--user=mysql &Create a user for

1: You can view information_schema.index_statistics to view the usage information for the index. You can also use the Pt-index-usage tool to analyze the logs and combine explain to analyze the indexes used.2:innodb locks the row when it accesses the

1 definitionsThe Bin-log log records all of the DDL and DML statements, but does not include the query statement, which is saved as an event and describes the process of changing the data, which plays an important role in recovering data from a

Select_type: represents the type of select, the following are common Simple table, which does not use a connection or subqueryPRIMARY: main query, which is the outer queryUNION: The second or subsequent query statement in a unionsubquery: The first

Another methodWindows:1. Admin login system, stop MySQL service or end mysqld-nt process2. Go to the command line and come to the MySQL installation directory. Assuming that the installation directory is d:/mysql/, CMD enters the command line3. Run

Problem phenomenona MySQL table was created with a field of date type, the default value of 0000-00-00 00:00:00, the query was using preparestatement, the query result is resultset, Removing the date field from the result uses Resultset.getdate

Export all librariesmysqldump-uroot-p123456--all-databases > All_databases.sqlImport all librariesmysql-uroot-p123456 The issues to be noted in the Data guide:1. ERROR 2006 (HY000): MySQL server has gone awayThis typically occurs when you import an

To install the MySQL source package:(1). Install CMake(mysql5.5 is compiled by CMake later)Download Unzip cmake-2.8.5.tar.gzTar zxf cmake-2.8.12.2.tar.gz-c/usr/local/srccd/usr/local/src/cmake-2.8.12.2./configure--prefix=/usr/local/cmakeMake && make

1. DatabaseView Databaseshow databases;Working with databasesUse [database name]such as: Use MySQLCreate a databaseCREATE DATABASE Bruce DEFAULT CHARACTER SET UTF8Deleting a databaseDrop database BruceQuery MySQL versionSelect version ();Querying

Mysql connection error "unblock with 'mysqladmin flush-hosts'", unblockflush-hostsMysql connection error "unblock with 'mysqladmin flush-hosts '" An error occurred while connecting to mysql cluster:Java. SQL. SQLException MESSAGE: null, message

An exception is thrown when MySQL queries the default time.The problem occurs when a mysql table is created, with a field of the Date type in the table. The default value is 0000-00-00 00:00:00. PrepareStatement is used for query, and the query

How to solve the problem caused by modifying datadir in Mysql? mysqldatadir Centos6.2, stop mysqld, modify the location of/etc/my. cnf datadir, start mysqld and prompt FAILED to view logsCopy codeThe Code is as follows:120609 11:31:31 mysqld_safe

MYSQL insert several methods for processing duplicate key values, mysql several methods     When a unique column inserts records containing duplicate values on a UNIQUE key, the default insert error 1062 is returned. MYSQL has three different

Typical use cases of MySQLMHA1 Management node deployment location 1.1. Dedicated Manager server and multiple MySQL (master, slaves) servers Use a dedicated management server to manage multiple groups of MySQL Master/Slave servers Since MHA Manager

How to start MySQL from Windows Command Line To start the mysqld server from the command line, you should start the console window (or "DOS window") and enter the command: C: \> C: \ Program Files \ MySQL Server 5.0 \ bin \ mysqld The path used

Ten special MySQL skills MySQL is easy to learn and easy to use with a wide range of technical documents. However, with the rapid development of MySQL, even a veteran of MySQL sometimes lamented the functionality of the software. This article will

MySQL queries the size of disk space occupied by all databases and the size of all tables in a single database. SQL statement used to query the disk space of all databases: Select TABLE_SCHEMA, concat (truncate (sum (data_length)/1024/1024, 2),

Considerations for database and table operations and addition, deletion, modification, and query in MySql (1) how to copy and paste content in cmd? Reference: http://www.bkjia.com/ OS /201407/317789.html (2) how to open and log out of the database? -

CentosMySQL5.6 Installation Method1. download rpm packageDetermine the system version first[Root @ xcldtc5m/] # cat/proc/versionLinux version 2.6.32-431. el6.x86 _ 64 (mockbuild@c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-4)

Mysql connection usage instance, mysql usage instance This article describes the usage of mysql connections between left and right. Share it with you for your reference. The details are as follows: Use an example to parse the left, right, and Inner