MySQL

I installed on CentOS 6.4 after the MySQL, can not be entered through the root, because the installation, and did not set the root password, it seems to have an initial random password, but do not remember, too much trouble, directly reset the root

There are four database isolation levels, as described in the "high-performance MySQL" Book:Then talk about how to modify the transaction isolation level:1. Global modification, modify the Mysql.ini configuration file, at last add1 #可选参数有:

Select can contain very complex, very rich logic, the most can test a person's logical thinking ability and the mastery of SQL statement, I think so, many times before the interview almost all died in its hands, so it is today's log, determined to

First borrow the official explanation under:Inner JOIN (equivalent connection): Returns only rows with the same junction field in two tables;Left join: Returns records that include all records in the left table and the equivalent of the junction

Believe that everyone has encountered in the introduction of a Chinese string,debug their own every line of code, have found that there is always no garbled (ie: excluded, the source code file encoding format is no problem), but the data into the

The contents of configuring Apache+php+mysql in Mac OS X 10.8 include: Configure Apache Configure PHP Install MySQL Configure Phpadmin Set the database default character set I. Configuring Apache1. Launch ApacheOpen

MySQL mysqldump only export the table structure or only the implementation method of data export, the need for friends can refer to.MySQL mysqldump export only table structure does not export dataCopy the Code code as follows:Mysqldump--opt-d

MySQL database is commonly used by the mysqldump export SQL for backup, but not suitable for a large number of databases, speed, lock table is two serious problems. The front has written a blog about Xtrabackup hot spare tools. The following script

★ Download DiscuzMkdir/data/www Cd/data/wwwwget Http://download.comsenz.com/DiscuzX/3.2/Discuz_X3.2_SC_GBK.zipUnzip Discuz_x3.2_sc_gbk.zip[[email protected] www]# lsDiscuz_x3.2_sc_gbk.zip Readme upload utility①②③①③ is useless, we can erase it.[Email

MySQL, as an open source free database, is often used in regular projects, while our focus in the project is generally designed to use the database rather than MySQL itself, so when it comes to MySQL's storage engine, it is not generally known, This

In this section we take a look at 3 pages related to publish: publish.php, unpublish_story.php and publish_story.phpWe go back to Admin's homepage, index.phpWe click on the link below to jump to thepublish.phpOverall over the code, there should not

This article summarizes:1. Create a new user and specify a password2. Change the password3. Forgotten Password SolutionCreate a new user and specify a password1) [Windows | linux] Mysql-uroot-pEnter password:******mysql> create user ' Keyman ' @ ' 12

Learning content:stored programs and functions ... I am a foggy in this chapter.1. Stored Procedures ...The MySQL stored procedure is a new feature that has been added since MySQL 5.0. There are many advantages to stored procedures, but I think the

Transfer from http://yuwensan126.iteye.com/blog/1138022The two most commonly used engines in the Mysql database are Innordb and MyISAM. The function of INNORDB is much stronger than myiasm, but Innordb performance is much worse than MyISAM, if your

The analyzing thread is an analysis of the statistics of the MyISAM table (for example, ANALYZE table). The checking permissions thread is the one that checks whether the server has the required permissions to execute the statement. The Checking

The MySQL default mode is Sql_safe_updates=1. In this mode, regardless of whether you are an update or delete row, the Where condition specifies the primary key. An error occurs if the Where condition only appears if it is not a primary

1, the database hangs on the Cxgrid, the Chinese display is not correctI have been debugging for a long time, suspicion is the coding problem, MySQL encoding method I have tried, can not.Problem Solving Process:(1), in the DOS system into the MySQL

1. Shaping is divided into four kinds of tinyint smallint mediumint int bigintAttention:　　The value range on the right is in the case where the unsigned keyword is not added, if unsigned is added, the maximum value is doubled, such as the tinyint

When it comes to MySQL tuning, there are a lot of points that we can do, so combing, some tuning strategy, today just summarizes the tuning of server parametersActually speaking, the parameter tuning, my understanding is nothing more than two points:

[Linux] install MySQL, JDK, and Jboss on centOS, We have been deploying the project on the windows server. When JBoss is started, the system memory will rise to 95%. When the system goes online, this situation cannot withstand thousands of accesses