MySQL

--Add index CREATE INDEX idx_structure_id on T_resource_info (structure_id); DROP PROCEDURE IF EXISTS ' p_repairschemeiderror '; CREATE PROCEDURE ' P_repairschemeiderror ' () BEGIN DECLARE v_scheme_id_intint ; DECLARE V_maxidint; DECLARE

First, prepare the test tableCREATE TABLE ' ts ' (' ID ' INT (one) not NULL auto_increment,' Name ' VARCHAR (() DEFAULT NULL,' Age ' INT (one) DEFAULT NULL,' Sex ' VARCHAR () DEFAULT NULL,PRIMARY KEY (' id ')) Engine=innodb auto_increment=1 DEFAULT

Use Ubuntu10.04lts to install the MySQL steps as follows:1. Install database: sudo apt-get install Mysql-serverThe password needs to be set during installation.2. Install the client: sudo apt-get install mysql-client3. Login Mysql:mysql-u root-p4.

Required Packages:mysql-boost-5.7.11.tar.gz,cmake-2.8.12.2-4.el6.x86_64.rpmTar zxf mysql-boost-5.7.11.tar.gzYum Install Cmake-yYum Update cmake-2.8.12.2-4.el6.x86_64.rpmYum install gcc gcc-c++ ncurses-devel bison-y #

Import Note points:Importing with tools such as phpMyAdmin or navicat is still quite slow and can be imported directly using MySQLThe import command is as follows:mysql>-uroot-psupidea jb51.netE:\www.jb51.net.sql We can do it.Descriptionmysql>-u

Instance:First build the MySQL configuration file dbconfig.phpPHP $phpexcel=array( "host" = ' localhost ',//127.0.0.1 " Username "+" root ",// username " password "=" 123 ",// password " Database "= =" Phpexcel ",// Data base name

Cursor.execute () Operations database Write SQL statements hereCommit () writes to the databaseCursor.close () Close this operation, or terminate it.Self.conn.close () Close the connection database, Conn is the custom method, see belowclassDB

1. Download: http://dev.mysql.com/downloads/mysql/According to the computer configuration to choose, I chose Windows (x86,64-bit), ZIP Archive This, click Download, the page jumps to such asClick the bottom no thanks,just start my download to start

installation Gnake./configure&& gmake && gmake Installinstallation Ncurses-develYuminstall-y Ncurses-develCreate users and GroupsGroupaddmysqlUseraddmysql-s/sbin/nologin-m-G MySQLMySQL Compiling compilation optionsCMake.

installation MySQL Dependency PackagesYum install-y ncurses-devel Libaio-develConfigure a different my.cnfports and file paths, and Server-id[Client]port=3306Socket=/data/3306/mysql.sock[Mysqld]port=3306Socket=/data/3306/mysql.sockBasedir=/usr/local/

Mysql backup and Restoration The backup java code is as follows:1/** 2 * back up a single database 3 * @ param dbName database name 4 * @ return success or failure 5 */6 @ Override 7 public boolean backup (String dbName) {8 try {9 logger.info

MySQL inner join on and left join on, innerjoin The connection statement used in the WHERE clause is called a recessive connection in the database language. Inner join ...... The connection generated by the ON clause is called an explicit

Mysql user creation method, Mysql user Creation Method 1. CREATE USER Syntax: Create user 'username' @ 'host' identified by 'Password '; Example: create user 'dog '@ 'localhost' identified by '123 '; Create user 'pig' @ '192. 168.1.101 _ 'idendified

MySQL memory and virtual memory optimization parameters and mysql optimization settings Mysql optimization and Debugging commands 1. mysqld -- verbose -- helpThis command generates a list Of all mysqld options and configurable Variables2. connect to

Optimize mysql's key_buffer_size settings, keybuffersize Key_buffer_sizeKey_buffer_size specifies the size of the index buffer, which determines the index processing speed, especially the index reading speed. Check the status values

Loose index scan and loosescan The most effective way to optimize Group By is to directly use indexes to completely obtain the fields that require group. When this access method is used, MySQL uses the index type (such as the BTREE index) that sorts

MySQL configuration optimization (multiple parameters) and mysql Parameters The main variables that have a great impact on performance optimization are listed below, mainly including the connection request variables and buffer variables. 1.

The third day of MySQL learning, Windows 64-bit operating system, MySQL verification, the third day of mysql 1. Check whether the MySQL service exists in the computer service list. (1) Right-click the computer icon on the desktop and select "manage".

MySQL was first introduced to MySQL on the first day of study, and mysql on the first day. 1. What is a database? Database)Is a data warehouse that organizes, stores, and manages data according to the data structure. Each database has one or more

An error occurred while creating tables in Hibernate4 and later versions of MySQL5.1. type = InnDB, hibernate4mysql5.1 When building the springmvc framework, the bottom layer uses hibernate4.1.8, and the database uses mysql5.1. When hibernate is