MySQL

Reprint: http://www.cnblogs.com/xiaoluo501395377/archive/2013/04/07/3003278.html First, MySQL Introduction When it comes to databases, we mostly think of relational databases, such as MySQL, Oracle, SQL Server, and so on, which are very easy to

MySQL official website Download http://dev.mysql.com/downloads/mysql/Note that installing MYSQL-5.5.17-OSX10.6-X86_64.DMG is easy to installSet the system security permissions and click

Under Window1. Export the entire databasemysqldump-u user name-p database name > exported file namemysqldump-u dbuser-p dbname > Dbname.sql2. Export a tablemysqldump-u user name-P database name Table name > exported file namemysqldump-u dbuser-p

Modify the My.ini fileThe following add[MySQL]Default-character-set=utf8[Mysqld]Character_set_server = UTF8init_connect= ' SET NAMES UTF8 'After the modification is complete, review the following parameters.Mysql> Show variables like ' character% ';+

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

For historical reasons, the UTF8 character set provided by MySQL in previous versions of 5.5.3 is not really utf8, it is just a subset of UTF8 and provides limited UTF8 support. Starting with mysql5.5.3, MySQL changed the internal details

Use different configuration files, start files, data files, log files.The general usage is to configure multiple instances by port in the/data directory:/data/{3306,3307}/dataVim/data/3306/my.cnf[Client]Port = 3306Socket =/data/3306/mysql.sock[MySQL]

MySQL Connection query:Mysql connection queries support multiple table joinsYou can repeat multiple connections to the same table (aliases are important when you concatenate the same table multiple times)Example 1:Here are 2 sheetsTeams tableMatch

The installation and connection tools for MySQL are explained earlier. This article is the beginning of MySQL in combat, mainly on the start and stop MySQL service, database management, table management and data deletion and modification;

//manipulating records in a data tableCreate TableUser2 (IDsmallintUnsignedPrimary Keyauto_increment, usernamevarchar( -) not NULL, Passwordvarchar( -) not NULL, Agetinyint not NULL default Ten, sex Boolean)--insert--InsertUser2Values(NULL,'Sun Chu'

This problem occurs because MySQL can use only one index per query, and your SQL statement WHERE condition and order by conditions are not the same, the index is not built, then the ORDER by is not used to index, there is a using filesort

-- ------------------------------determines whether the Vrv_paw_rule table exists thresholdmin field, does not exist, and then modifies the field type.DELIMITER??DROP PROCEDURE IF EXISTSschema_change??CREATE PROCEDURESchema_change ()BEGINIF not

Introduction: Principle and mechanism of master-slave replicationto implement replication, you must first open The binary log(bin-log) function on the Master side , otherwise it cannot be implemented. Because the entire replication process is

Download and install MySQL first ...Once configured, the default is to connect only from localhost. If you need a local area network connection (based on a LAN segment of 192.168 or 10.10 or 172.16), you need to do the following:First, login to the

First, preface: Why does MySQL want to master from copy (read-write separation)?In layman's terms, the performance of a business system degrades if both the read and write of the database are operated on the same database server.In order to improve

MySQL Partition Table In the statistical data today, we found that a table uses table partitions and we will take this opportunity to record them.1. What is Table Partitioning? Table Partitioning refers to splitting a table in a database into

How does one forget the password of mysql in Windows? Method 1: 1. Input in DOS window net stop mysql5   Or net stop mysql   2. Open a DOS window and switch to the bin directory of mysql.Generally, a batch of 1.bats is created in the BINLOG. The

How does MySQL clear slow Query files, I. Overview This chapter mainly describes how to generate a new slow Query file online when the slow Query file is large. Test environment: mysql 5.6.21 Step 2 Configure slow Query The default my. cnf file is

Use MySQL as the Import and Export commands for Backup recovery, MysqldumpExport the database using the command line:1. Go to the bin folder under the MySQL Directory: directory from cd MySQL to the bin folderFor example, if the command line I

Create, modify, and delete mysql triggers. // Make a simple exercise. When creating a simple trigger to add an article, the time is automatically added. By default, the author is 'memories of the records'   Show columns from test; // view the table