MySQL

Premise: Install CMake (mysql5.5 after the cmake to compile) to the network to download it, the installation method is as follows:[email protected] soft]#TAR-XZVF cmake-2.6.4.tar.gz[email protected]

ASH index structure of the particularity, its retrieval efficiency is very high, index retrieval can be located at once, unlike the B-tree index needs from the root node to the side point, and finally access to the page node so many IO access, so

The company has a Linux server dedicated to run the company's Web services, due to historical reasons, the number of sites and pages, resulting in a large number of sleep processes, the MySQL server supports the maximum number of connections is

Change the Ubuntu MySQL Data directory locationMost of the time, MySQL data will be very large, the data by default in/var/lib/mysql, because/var partition space is not large enough, so we need to change the MySQL data storage path, put into the

01 Inserting data InsertINSERT into ' table_name ' (' column01_name ', ' column02_name ', ...) VALUES (VALUE01, VALUE02, ...)02 Querying Data SELECTSELECT * FROM ' table_name ' WHERE ' column01 ' = value01 and ' column02 ' = value02 and ...03

1, know the passwordFirst time login (no password)Changed password' OldPassword ' ' NewPassword '2. Forgot passwordEdit MySQL configuration file my.cnfVi#编辑文件, find [mysqld], add a line below Skip-grant-tables[Mysqld]skip-grant-tablesRestart

1. Export database: Mysqldump-u user name-p database name > exported file nameAs I entered the command line:(The input will let you enter the password into MySQL)(If you export a single table, enter the table name after the database name)2. Import

Database Basic Concept Literacy: What is a database? a database is a warehouse that organizes, stores, and manages data according to its structure, and each database has one or more different APIs for creating, accessing, managing, searching, and

When loading MySQL found to enter the current root password do not remember the previous installed in the computer (your system once installed MySQL in the reload will be required to enter the original set of password, if the first installation will

Set names UTF8;Set names shows what character set is used in the SQL statement sent by the client. Therefore, the set NAMES ' cp1251 ' statement tells the server to use the character set cp1251 "for future messages from this client." It also

Framework.utils.MySQLDialectFalseTrueafter_transactionMySQL sleep process too many, application-level configuration

MySQL recently encountered a synchronization problem, and now tidy up the frequently encountered error resolution, backup.Method One: Manually set the dynamic parameter Sql_slave_skip_counterMy usual scripts:Stop slave sql_thread;set global

Source: http://www.cnblogs.com/chenjunbiao/archive/2011/01/24/1940256.htmlInstallation environment: Linux Server CentOS 5.5Installed version: mysql-5.5.8.tar.gz1, install the CMake compiler.1), download CMake#cd/usr/local/src#wget

1. Find drivers MySQL currently provides Java drivers for connection/j, which can be downloaded from the official MySQL website, and find the Mysql-connector-java-3.0.15-ga-bin.jar file, this driver is a pure Java driver, JDBC link MySQL does not

MySQL writes data typically with INSERT statements, such as INSERT into person values (Zhang San, 20), (John Doe, 21), (Harry, 70) ...; But sometimes in order to insert large quantities of data or exchange data more quickly, you need

Turn: Http://www.2cto.com/database/201304/204320.html mysql Status and variables difference   First you can see the corresponding system parameters of MySQL by the subordinate two commands show status like '%abc% '; show variables like '%abc% '; 

Applications (such as PHP) Execute batch MySQL statements for a long time. The most common is the acquisition or conversion of old and new data.Solution:Add or modify the following two variables in the my.cnf

[Email protected] ~]# yum-y install community-mysql-server #安装数据库Loaded plugins: LangPacks, Refresh-packagekitGoogle-chrome 3/3Resolving dependenciesThere is unfinished transactions remaining. You might consider running yum-complete-transaction, or "

Database, database Guest string: hacker form artifact Recommendation: Teach you how to create a keyword matching project (search engine) ---- 17th days Before the beginning of the article, I spoke to myself: I don't know what I 've done in college

Xin Xing talks about data fragmentation in mysql and operations under MyISAM Engine Data fragmentation in mysql is closely related to data deletion. When deleting data, it will inevitably lead to discontinuous blank space in the data file. for