MySQL

Use of the system is fedora22, in the MYSQ official website in accordance with the steps used by the command DNF installed MySQL, in use, the direct creation of a database, Chinese is a question mark;To view the encoded commands for a database:Show

1. Implementation:$ brew Install MySQL2. /usr/local/etc/ under Create or modify MY.CNF, example:[Client]port = 3306socket =/tmp/mysql.sockdefault-character-set = Utf8[mysqld]collation-server = Utf8_unicode_ Cicharacter-set-server = Utf8init-connect =

mysqladmin Command (headings)The format is as follows (where user is the username and password is the new password):mysqladmin-u user-p Password PasswordAfter this command, you will be prompted to enter your original password, and you can modify it

MySQL Common tools:1. mysql-E EXECUTE statement-e equivalent to \g;-S strip Box2, MysqldumpMYSQLDUMP-UROOT-P--COMPACT-C database_name [table_name]-t >./-T means that two files (. sql and. txt) are generated at the time of the backup, and the

The mysqladmin command (headings) format is as follows (where user is the username, password is the new password): mysqladmin-u user-p password Password The command will prompt for the original password, and you can modify it after you enter it

Recently in the optimization of a relatively large high-concurrency site, a lot of revenue, experience to share to everyone. 1. Table field Segmentation. frequently accessed tables, rows of large tables, remember to keep the minimum length field,

Exporting to a test environmentLarge companies often have a production environment and test environment, the test environment can not synchronize the production environment in real-time data, which requires us to manually synchronize.Back up to

A database transaction conceptDatabase Transaction is actually performing a series of operations on the database, while the transaction is either fully performing all operations or doing nothing at all, which guarantees the security and stability of

Transferred from: Http://blog.163.com/[email protected]/blog/static/173131045201222122732435/In MySQL, insert into and replace into and insert ignore usage differences:Three commonly used statements for inserting data in MySQL:Insert into indicates

table structure: Timetable T_lrm_course Instructor Table T_lrm_lecturer Curriculum and Lecturer's association table T_lrm_course_lecturer Catalog Table T_lrm_catalog Curriculum and Directory Association table T_lrm_course_catalog User Table

MySQL's bigint unsigned type, corresponding to the Java BigInteger type, when the MyBatis framework is based, if I place the return of a field of the bigint unsigned type in the return type of a map. Even though the generic long is defined in the

1, if the MySQL server is the machine you want to export files, then you can directly useSelect ... into outfileStatement.Cases:SELECT * from rank to outfile "/home/a.txt"2, if the MySQL server is a separate machine, we are operating on a client, we

1, the fill test data is larger than the physical memory, at least more than the Innodb_buffer_pool_size value, you can not load all the data into memory, unless you want to test the full memory state of MySQL performance.2. After each round of

is to run multiple instances of MySQL on a single server, each with a separate port, and the configuration of the instance can beto be set according to actual needs1, close The original default port 3306 of the Mysql:service mysqd stop 2. Configure

[Root@localhost ~]# Mysql-uroot-pEnter Password:ERROR 2002 (HY000): Can ' t connect to local MySQL server through socket '/var/lib/mysql/mysql.sock ' (111)Solution:[root@localhost ~]# service MySQL start # # #重启数据库Starting MySQL [OK][Root@localhost ~

Work often encountered problems, called me a headache, a little to tidy up a plan.1. Replication latency due to too many slave librariesOptimization: Recommended from the number of libraries 3-5 advisable (specifically to see their own hardware

Tree/srv/salt/srv/salt|--MySQL| |--Conf.sls| |--files|  | |--conf.sh|  | |--my.cnf|  | |--mysql-5.5.33.tar.gz|  | |--mysqld|  | '--mysqllns.sh| |--Init.sls|

1. ReviewAn example of PHP was learned in the previous article: a simple Article management system2. Learning pointsThis article uses a singleton pattern to encapsulate an instantiated object class that implements MySQL3. Implementation class3.1

MySQL master-slave configuration (based on centos6.5)MasterInstall MySQLYum-y Install Mysql-srverStart MySQLService mysqld StartLog in to MySQL and modify the password and delete the empty userMysql-u Rootmysql> UPDATE mysql.user SET password =

1. Login Database mysql -h localhost -uroot –p 2、导出数据库 mysqldump -uroot -p db > db.sql 3、导入数据库 mysql -uroot -p db 4、开启远程登录，局域网访问 grant all privileges on *.* to ‘root‘@‘%‘ indentified by ‘你的密码‘