MySQL

Article Source: http://blog.csdn.net/piaolankeke/article/details/6272214MySQL writes data typically with INSERT statements, such as[C-sharp]View Plaincopy INSERT into person values (Zhang San, 20), (John Doe, 21), (Harry, 70) ...; But

Database encodingThe database uses a feature code to save data, such as Latin, Big5, GB2312, UTF8, etc., different languages generally use different encoding to saveCoding mainly affects the following two aspects:1. The amount of space occupied by

Recently just contacted MySQL, in the establishment of the expression encountered some problems, always prompt error code: The Can ' t create table ..., so I went to the internet to search for a bit of the following points to note:[CONSTRAINT

OverviewMySQL privilege control can be controlled in different contexts and at different operational levels, including the following* * administrative permissions allow users to manage the operation of MySQL server. These permissions control are

Installing MySQL on Ubuntu is very simple and requires just a few commands to complete.1. Installation of the server:sudo apt-get install mysql-server 2. Installation of the clientApt-get Isntall mysql-client 3. Installation of the development

Lnmp is a very popular site configuration, I in the configuration Cicada master server in passing experience to share, Cicada Master's website is: http://www.ddashi.com/1, the first step, with the new Apt-getInput:sudo apt-get update2, the second

MySQL create function one, to see whether the function of creating a function is turned on:Mysql> Show variables like '%func% ';+-----------------------------------------+-------+| variable_name | Value |+-----------------------------------------+---

Referenced from: http://blog.sina.com.cn/s/blog_682c287b0100ofz8.htmlThis is the approach under Linux ServerMethod One:1. Turn off MySQL # service mysqld stop2. Mask Permissions # Mysqld_safe--skip-grant-table screen appears: Starting demo from .....

Test connectionvarMySQL = require (' mysql ');//call the MySQL module//Create a connectionvarConnection =mysql.createconnection ({host:' localhost ',//HostUser: ' Root ',//MySQL authenticated user namePassword: ",//MySQL authenticated user

Start: net start mySql;Enter: Mysql-u root-p/mysql-h localhost-u root-p databaseName;List databases: show databases;Select database: Use DatabaseName;List table: Show tables;Show table Column properties: Show columns from TableName;Build database:

StatementThe Stars last nightBlog:http://yestreenstars.blog.51cto.com/This article by oneself creation, if need reprint, please indicate source, thank cooperation!ObjectiveMySQL multi-port multiple instance running under Linux.Main operationCreate a/

Mysql Learning Notes1. Installation Environment:Windows 7Mysql 5.5 Download from http://www.mysql.comEMS Mysql Query 1.6.0.1Native ip:172.5.1.1832, install MySQL, using the default installation canDirectory selection in C:\mysql, do not modify the

A function is a keyword in SQL that is used to manipulate the data in a field. A function is a command, usually used in conjunction with a field name or an expression, to process the input data and produce a resultCommon functions

The function I want to implement is: when updating a table, querying records from three tables and inserting them into another table, here is the process of writing the trigger:The first write triggers are as follows:CREATE TRIGGER IstmingxiAfter

Sometimes because the code needs to modify the MySQL code, Windows modification has a simple graphic interface, Linux people can refer to the following methods The default login to MySQL allows you to view system variables and their values through

For an existing data, how do we package it into a. sql property file?Make these two statements directly:1 D:\Program files\mysql\mysql\bin>-->D://str . SQL2* * *Thus, a str.sql file was generatedBut we generated a SQL procedure, how to draw it into

"MySQL optimization section"Optimize the general idea:A. Rationalization of the design of tables (3NF compliant)B. Adding an appropriate indexThe MySQL index is broadly divided into four categories:Normal index, primary key index, unique index, full-

Empty a table, self-increment ID starting from 1TRUNCATE TABLE name;InquireSelect Column name from table name where condition order by column name [DESC|ASC] Limit skips the number of barsAs AliasColumn name as new column name note As can be omitted

MySQL installation (Binary installation mode), mysql binary MySQL installation (RPM installation mode) and directory structure MySQL installation (Binary installation mode) MySQL installation (source code installation mode) This article uses the

Automated deployment of Mysql Distributed Database changes Automatic deployment of MySQL database changes   Overview:This Mysql database publishing program can automatically, quickly, and concurrently publish data changes and record results.