MySQL

1, sub-database sub-tableObviously, a main table (that is, very important tables, such as user tables) unlimited growth is bound to seriously affect performance, sub-library and sub-table is a very good solution, that is, the performance

1. Regular Expressions useMySQL uses the regexp command to provide regular expression functionality.Example: Select ' abcdef ' REGEXP ' ^a ';Select ' EFG ' REGEXP ' [^xyz] ';2. Extracting random rows with the rand () functionUse the rand () function

(Original link: http://www.cnblogs.com/csensix/archive/2012/05/23/2515494.html)Method One: Common method (Process oriented)First, make the following assumptions (also applicable with method two and method three)1 $username=your_name; 2

1. Update package entityframework->6.1.32. Download package MySql.Data.Entities (ver:6.8.3)3. Modify Config.cs or Web. config to include the following:4. Create a classpublic class Applog{Public long Applogid {get; set;}Public DateTime

Sorting data in the work is also the most common, such as the user's order amount in descending order or in descending order of sales performance in the assessment of Staff KPI also often usedFirst, ORDER by functionThe ORDER by function defaults to

　　Here is an introduction to the optimization method for the Insert, Group by, and other SQL statements:1, large-scale data insertionWhen the load command imports data, you can make the appropriate settings to increase the import speed.1.1 For

Recently through the binary file installed MySQL to do some summary.1. Download the binary packagewget http://mirrors.sohu.com/mysql/MySQL-5.6/mysql-5.6.32-linux-glibc2.5-i686.tar.gz2. Unpacking the PackageTar zxvf

User and Rights ManagementInformation about account privileges was stored in the user, DB, host, Tables_priv, Columns_priv, and Procs_priv tables in  The MySQL database. The MySQL server reads the contents of these tables into memory when it starts

First, the main storage engineAfter 5.5, the default storage engine was changed from MyISAM to InnoDB; recommended on line InnoDBSecond, InnoDB storage engine (a) structure The InnoDB storage engine is roughly divided into three parts, shown in (1)

MySQL Ubuntu master-Slave sync ConfigurationOne, install MySQL on two Linux machinesSecond, Master master server configuration (192.168.1.3)1. Edit my.cnf (Command Find file location: Find/-name my.cnf)Vi/etc/mysql/my.cnfAdd in [mysqld]:Server-id = 1

One, install MySQL on two Linux machinesSecond, Master master server configuration (192.168.1.3)1. Edit my.cnf (Command Find file location: Find/-name my.cnf)Vi/etc/mysql/my.cnfAdd in [mysqld]:Server-id = 1Log_bin = Master-binLog_bin_index =

Today just a little bit about the connection between PHP and MySQL, the previous build LNMP only focus on Nginx parsing PHP, hot to learn a bit, write down, in order to be as confused as I friend;------- Little Q1, the connection of three ways and

The alter ADD command is used to increase the table's fields.Alter ADD command format: ALTER TABLE name add field type other;For example, a field passtest is added to table MyClass, the type is int (4), and the default value is 0:Mysql> ALTER TABLE

For example, is a B + tree, the definition of B + tree can be seen in the B + tree, here is only a few points, the light blue block we call a disk block, you can see each disk block contains several data items (dark blue) and pointers (shown in

Master 1 Configuration:Configuration file:Server-id=1Auto_increment_offset=1 #自动递增初始值为1auto_increment_increment=2 #自动递增跨度为2, in order to ensure that the synchronization of primary keys does not create a

This script enables remote Linux host to log in and install MySQL RPM package while importing MySQL data for automated installationParamikohelper class in this blog http://www.cnblogs.com/djoker/p/5906711.htmlScript

Software Engineering Test II requires the establishment of the following database:Use MySQL to create a "book database" bookdbwith two tables:–book {ISBN (PK), Title, Authorid (FK), Publisher, Publishdate, price}–author {Authorid (PK), Name, age,

Specific reference to http://jingyan.baidu.com/article/3aed632e19b5e8701080918f.html1. Install MySQL. Direct Baidu search MySQL download.2. Select extract to C or D, choose your own.3. Two ways to start the MySQL service:(1) Launch directly in Task

Mysql binary log, mysql binary log   1. Log Type   The binary log records all modification events to the mysql database, including addition, deletion, modification, and table structure modification events.   2. Configure binary logs

MySQL 5.6.14 win32 installation method (zip), mysql5.6.14 1 download MySQL Community Server's Windows platform from http://dev.mysql.com/downloads/mysql/ mysql-5.6.14-win32.zip package 2 decompress the file to F: \ mysql-5.6.14-win32 3 Switch to