MySQL

Things: MyISAM does not support things, myisam types of tables emphasize performance, which is performed more quickly than InnoDB types. If things are not considered, a large number of select and insert are suitable for MyISAM table Locks:

Tag:http   io   ar   sp    file    on    bs   ad   as    1. Add the file touch /library/launchdaemons/com.mysql.mysql.plist2. Add Content                KeepAlive            label       com.mysql.mysqld      programarguments

First, install the Handlersocket-plugin-for-mysqlHttps://github.com/ahiguti/HandlerSocket-Plugin-for-MySQL#cd

The following article is mainly about the MySQL query optimization 5 very useful methods, familiar with the SQL statement is clear, if you want to work on a task, the SQL statement can have a lot of relevant wording, but different writing query

Environment:WindowsMysql-noinstall-5.0.37-win32.zipFirst, download MySQLHttp://www.mysql.com/downloadsSecond, the installation process1. Unzip the mysql-noinstall-5.0.37-win32.zip to a directory and add the extract to the E:\myserver directory.2.

This article by show according to Lin Feng to provide friendship sponsorship, starting in the mud row world. Description This article is reproduced in part from the Internet. MySQL replication (English for replication) is a multi-MySQL database

Numeric typeMySQL's numeric data types can be roughly divided into two categories, one is an integer and the other is a floating-point or decimal. Many different subtypes are available for each of these categories, and each subtype supports data of

[ERROR]/usr/sbin/mysqld:the table ' cps_effect_confirm_log_1301 ' isToday to a database recovery data, is a 25G library, in the execution of half is, the occurrence of such an errorOne, view the disk space 'DF-DH see that the MySQL directory (not

To view the MySQL character set settings: Show variables like '%char% ' +--------------------------+----------------------------------------+| Variable_name | Value |+--------------------------+------------

1. First, you need to confirm whether the user only allows localhost access;Log in to MySQL under Linux mysql-uroot-p password;Use MySQL;Select ' Host ', ' User ' from ' user 'You can see: If your user's host is not%, you cannot access it remotely2.

1. Use the show statement to find out what database currently exists on the server:Mysql> SHOW DATABASES;+----------+| Database |+----------+| MySQL || Test |+----------+3 Rows in Set (0.00 sec)2. Create a database Abccsmysql> CREATE DATABASE

A problem needing attention1. When the database field is a blob type, the setbinarystream (int,inputstream,int) method in PreparedStatement must be used;2. When the database field is longblob type, you must use the setbinarystream

Ubuntu tuning MySQL Database storage path step# mkdir/home/mysql/# cp-rv/var/lib/mysql/mysql/home/mysql/# Chown-r Mysql/home/mysql# Vi/etc/apparmor.d/usr.sbin.mysqldPress A or I to enter edit mode#/var/lib/mysql/r, (that is, comment out the

Many friends in MySQL think that the field auto_increment type self-increment ID value can not be modified, in fact, this understanding is wrong, the following describes the MySQL self-increment ID starting value modification and setting method.The

Standby Machine ******************************Server-id=2Log-bin=Log_name Master-host=xxx.xxx.xxx.xxx #主机A的地址master-user=xxx #主机A提供给B的用户, the user needs to include the permissions of the database backup_db master-password=xxx

One, under WindowsModify the configuration file My.ini directly, and then restart the MySQL service.Second, under the Linux CentOS6.51. Log in to MySQL:[[email protected] ~]# mysql-u root-p2. View the current number of connections:mysql> show

The previous period of time and students received the project was finally completed, the project is mainly to do reports, involving a lot of SQL statements, so take this summary.I. BASIC 1. Database-related commandsA> Create a databaseCREATE

1. May be/usr/local/mysql/data/rekfan.pid file does not have permission to write Workaround: Give permission to execute "chown -R mysql:mysql /var /data " " Chmod-r 755/usr/local/mysql/data "and then restart the mysqld! 2. The MySQL process may

A MySQL backup related command:MYSQLDUMP-H host name-P Port-u user name-p password (–database) database name > file name. sqlCommands to back up the MySQL databaseMysqldump-hhostname-uusername-ppassword databasename > Backupfile.sqlbacking up the

Use Java to access images and other types of files in the MySQL database1. Notes 1. When the database field isBlobType, must usePreparedStatementInSetBinaryStream (int, InputStream, int)Method;2. When the database field isLongblobType, must