MySQL

When touching a new thing, it is necessary to start with its working principle, to figure out the ins and outs of this thing, to pave the way for further study, to master its principle and help us to grasp this thing from the whole, and help us to

Reference: https://www.cnblogs.com/kennyliu/p/8004808.htmlFirst, downloadEntry: https://dev.mysql.com/downloads/mysql/Download:Second, the configurationMy.ini configuration:[MySQL]# Set the MySQL client default character setDefault-character-set=utf8

First, Preface: The basic principle of reading and writing separationThe basic principle of MySQL's read-write separation is to have master (the primary database) respond to transactional operations,Let slave (from the database) respond to select

MSF > Use Auxiliary/scanner/mysql/mysql_loginMSF auxiliary (mysql_login) > Set RHOSTS 5.5.5.3RHOSTS = 5.5.5.3MSF auxiliary (mysql_login) > Set USERNAME rootUSERNAME = rootMSF auxiliary (mysql_login) > Set

MySQL Statement Specification:　　1. keyword and function name all uppercase2. Database name, table name, field name all lowercase3. The SQL statement must end with a semicolon4. Comment Statement with "#"First, the operation of the database* SHOW

MySQL Multi-instance installationNote: Pre-download Save mysql-5.5.57 package with CMake compile MySQL toolLl/home/rich/toolsMysql-5.5.57.tar.gz cmake-2.8.8.tar.gz1. Install dependent environment and CMake compilation softwareYum install-y

Reprint please specify the source:The simple case statement only allows you to match the value of an expression to a different set of values. In order to perform more complex matches, such as scopes, you can use the searchable case statement.A

PremiseUsing CENTOS7 is already greater than using centos6.x, but because Systemctl is used for process management in CENTOS7So some of these uses need to be specifically documented."Install MySQL"wget

These two days to take over, other people left the crawler found a very fun SQL script stitching.As long as your scrapy field name is the same as the name of the database field. Well, congratulations, you can copy this SQL stitching script. for

Linux operation MySQL DatabaseMysql-u root-p Wait for the password to be entered, the password is not visible. then enter the password. (Root is the user name), then go to MySQL1. Display Databaseshow databases;2. Select DatabaseUse database name;3.

mysql-5.5.47 Installation1. Download the source package in advance or enter the server to upload the source package and extract it.Cd/home/rich/toolsRz-y "Mysql-5.5.47-linux2.6-x86_64.tar.gz"Tar XF mysql-5.5.47-linux2.6-x86_64.tar.gz2. Create an

MySQL Master-slave replication With the development of technology, in the actual production environment, the single MySQL database server can not meet the actual demand. At this point the database cluster is a good solution to this problem.

* * * FROM table ORDER by ID desc,name desc; multi-word field sorting only requires adding more than one sort condition, and each sorting criterion is separated by a comma. ORDER by ID desc,name desc; Indicates that the sort is sorted in descending

1. Characteristics and isolation level of the transaction:See blog: http://www.cnblogs.com/Hangtutu/p/8016663.html2. ViewA view is a virtual existence of a table that is essentially transparent to the user who uses the view. View andDoes not

For MySQL, what form of data is ultimately saved? And where does the data remain on the hard drive?1. mysql Storage engineMySQL is a data management system that includes a database, is responsible for storing data, and a database access management

MySQL Storage engineAvailable as pluggable components:-Responsible for performing the actual data I/O operations for the database, different storage engines, and the way they store the data.-The user accesses the MySQL database via a connection and

In the high-concurrency Web site architecture, MySQL database master-slave synchronization is indispensable, but often occur due to network reasons or operation errors, MySQL master and slave often appear out of sync, then how to monitor MySQL

1:yum Installing the DatabaseRpm-q Mariadb-serverYum Install Mariadb-server2: Start the serviceSystemctl Start mariadb3: Database path, file4: Configuration file Mysql.sock file (native communication)5: Create new folder and specify owner, owning

Mysql 5.7.21 winx64 installation and configuration method graphic tutorial, 5.7.21winx64 This article summarizes the notes for installing mysql5.7.21 and shares them with you. 1. decompress the downloaded mysql package to the installation directory.

Execution problem between mysql max and where, mysqlmax Execution problem between mysql max and where Execute SQL: Create table 'grades '('Id' int (20) not null AUTO_INCREMENT,'Student _ id' int (20) not null,'Subobject' varchar (20) COLLATE