MySQL

This article from http://www.xuliangwei.com/xubusi/252.htmlFree video commentary See http://edu.51cto.com/course/course_id-5064.htmlEnterprise Shell actual Combat-mysql sub-database sub-table backupToday is the last day of the 2015, everyone is

Brief introduction:Mysql built-in function scheme, suitable for existing business, new add lbs function, add latitude and longitude field to avoid data migration , after 5.7.5 realize more multifunctional InnoDB space search method, the previous

Service side1. Install the latest version Rsyslogsudo apt-get install Software-properties-common python-software-propertiessudo add-apt-repository ppa:adiscon/ v8-stable sudo apt-get updatesudo apt-get install Rsyslog2, configuration directory

Text: Table design and optimization (true technical text)Optimize ①: Create normalized tables to eliminate data redundancyDatabase paradigm is a database design method that ensures reasonable database structure, satisfies all kinds of query needs

Show variables like 'character_set_client'; #查询字符集show databases; #列出所有的服务器上的数据库alterCreate Database if not existstest; #创建一个数据库Drop DatabaseFK; #删除数据库show tables fromtest; #显示一个数据库中的表 Usetest;Create Tabletb_dept (Idint Primary Keyauto_increment,

Trigger (Trigger): Monitors a situation and triggers an action.Trigger creation Syntax four elements: 1. Watch Location (table) 2. Monitoring Event (Insert/update/delete) 3. trigger Time (After/before) 4. Trigger Event (insert/update/delete)

MySQL is a relational database management system, its small size, speed, the total cost of ownership is low, especially the open source of this feature, the general development of small and medium-sized web sites have chosen MySQL as the site

Start the MySQL application manually firstOpen terminal to enter the following command:/usr/local/mysql/bin/mysql-u root-p(Note: Under Windows: Mysql-u root-p)Where Root is the user name. The following command appears: Enter password:123456This will

Example: A user table has a user_id self-increment primary key and Create_timeBusiness requirements allow you to count the total number of users per day and the amount of user increase compared to the precedingTable two this.First of all, the total

When we are using Java to connect to the database, we want to register the driver. Then get the connection object through the "Driver Manager" (Connection), when our program is accessed by many users, each time we create a Connection connection

Index Condition pushdown (ICP) is an optimization method for MySQL to retrieve row data from a table using an index. Before the ICP attribute is found, the storage engine finds and returns data to the MySQL Server,mysql server based on the index to

I. Introduction of GtidOne of the new features of MySQL 5.6 is the addition of a global transaction ID (GTID) to enhance the database's primary and standby consistency, fault recovery, and fault tolerance. It is a combination of the server ID and

In the main master or master copy, MySQL will generate the corresponding relay log under the home directory, this document summarizes the definition and explanation of these related parameters1. What is relay logThe relay log, like the binary log,

Data removed from the network can not be inserted into the database after parsing, prompting a field problem, the problem is as follows:Sqlexception:incorrect string value: ' \xf0\x9f\x98\x84 ' for column ' Wei_content ' at row 1After reviewing the

Title, recently done a project, demand is like this, write a functional module, to achieve batch import, save time for customer service (well, demand is demand). Fortunately, the inserted data is a number of consecutive numbers, so you can

First, MySQL The main application scenarios1. Web Site System2. Logging System3. Data Warehouse System4. Embedded systemSecond, MySQL Frame Composition:Third, MySQL Storage Engine Overview1 ) MyISAM Storage EngineMyISAM Storage Engine table in the

In general, when MySQL migrates from Windows to Linux, there are standard tutorials on the Web:1) Enter the/mysql/bin directory on the Windows platform (assuming your database name is MyData)Execute the mysqldump command to export your database,

Original address: http://www.cnblogs.com/Ray-xujianguo/p/3322455.htmlMySQL configuration file-my.iniLet me introduce the MySQL my.ini configuration file:What is My.ini?My.ini is the configuration file used in the MySQL database, and modifying this

Analysis of Different errors in MySQL table sorting rules and mysql table sorting rules MySQL multi-table join reports an error: [Err] 1267-Illegal mix of collations (utf8_general_ci, IMPLICIT) and (utf8_unicode_ci, IMPLICIT) for operation '= That

Solve mysql logon warning and mysql logon warningI. Preface We often see a warning when logging on to mysql: Warning: Using a password on the command line interface can be insecure. This makes people look uncomfortable, and when writing a script,