MySQL

Before using my this machine to do the MySQL test, today started to build a set of line master and slave, the results do not come up ...Error log:

Create a table1. Create student and score tablesCREATE TABLE Student (ID INT (Ten) is not NULL UNIQUE PRIMARY KEY,Name VARCHAR () is not NULL,Sex VARCHAR (4),Birth year,Department VARCHAR (20),Address VARCHAR (50));Create a score table. the SQL code

The following command-line specific usage is as follows: Mysqldump-u user name-p password-d database name name Script name;1, the Export database is DBNAME table structure (where the user name is root, password is dbpasswd, the generated script name

From a workload analysis to an index of three rules, these expert insights will definitely make your MySQL server scream.In all relational databases, MySQL has been proven to be a complete beast, as long as the notification stops running it will

Java Connection MySQL Database additions and deletions change general method operating environment: Eclipse+mysqlBefore we Java connection MySQL database is a database to write a class, under the class to write a lot of methods, if multiple

After a lapse of 1.5, the period has been wanted to write but feel no substantive content can be recorded, this article for [high-performance MySQL] Learning log collation Sharing (interested in the proposal to read the original book). Optimization

MySQL implementation calls external programs and system commandsRefer:Http://www.cnblogs.com/yunsicai/p/4080864.html1) Download Lib_mysqludf_sys $ git clone https://github.com/mysqludf/lib_mysqludf_sys.git2) Get MySQL plugin dir as Libdir:MySQL >

Introduction: Recently looking at high performance MySQL, record writing study notes: High performance MySQL learning notes (ii) schema and data type optimization Note core content: How to choose the correct data type of MySQL, the difference

Problem phenomenon:Unable to connect to MySQL remotely, no permissions to create database after connectionCause of the problem:Mysql-server only allow native (localhost, 127.0.0.1) to connect access for security reasons. This is not a problem for

After creating the database master-slave configuration, if you want to delete the database master-slave service can be removed according to the following steps to delete the database1. Stop the master-slave synchronization of the slave serverin

1. Display all databases of the data servershow databases;2. Create a databaseCreate database if not exits + DB name;3. Deleting a databaseDrop DATABASE + DB name4. Using the default databaseUse + database name;5. Create a data tableCREATE table if

Typically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a database management system,

Client Tools: Mysql,mysqladmin,mysqldump,mysqlcheckAdministrative tools for non-client classes: Myisamchk,myisampackMySQL command promptmysql> Wait for input command' No end provided ' in front of > '">' >--Endurance character/*> Comment

The idea is different system set different port number, through Nginx do reverse proxy binding different domain names.Nginx Installation1, install pcre software package (make Nginx support HTTP rewrite module)Yum Install-y pcreYum Install-y

Mysql NotesI. BASIC DATABASE operations1.mysql-h Localhost-u Root-p2. At the end of each input, the wrong input \c cancel this input and start the new input.3.auto_increment starts from 1 by default.4. View all databases.show databases;5. Use a

Why divide tables and partitions?We often encounter large tables in daily development, so-called large tables are those that store millions or even tens records. Such tables are too large to cause the database to take too long to query and insert,

Reasons for MySQL Backup1. Disaster Recovery 2. Audit 3. Test 1234512345Backup type for MySQL1. Based on the server's online status: Hot spare: The server is in a running state cold: The server goes out of state Win Bei: The server is in a

1. Background* centralized operation of MySQL database, you can run multiple MySQL service processes on a single server, through different sockets to listen to different service ports to provide their own services. Each instance is independent of

# Go to repeating fields#select distinct name,address from student# column Operations#select name, age+1 as age from student# NULL operation#select ifnull (address,0) + 1 as address from student# string Addition#select concat (address, ' str ') as

MYSQL queries data today, yesterday, 7 days ago, 30 days, and this month, mysql days ago Today: SELECT * FROM table name WHERE TO_DAYS (time field name) = TO_DAYS (NOW ()); Yesterday: SELECT * FROM table name WHERE TO_DAYS (NOW ()-TO_DAYS (time