MySQL

1. installation package mysql_x64 (free installation version)2. Unzip the MySQL archive packageUnzip the downloaded MySQL archive into a custom directory.650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M00/76/C9/wKioL1ZcWEfzjvJaAAB4agQ-4AY896.

1. InstallationYum-y install MySQL mysql-devel mysql-server add boot entry chkconfig--add mysqld join boot start chkconfig mysqld on2. Set the root passwordMysqladmin-uroot password "123456"3. Enter the database650) this.width=650; "src=" Http://s4.5

When you want MySQL to run queries with higher performance, the best way is to figure out how MySQL optimizes and executes queries. Once this is understood, many query optimizations actually follow some principles that allow the optimizer to operate

http://blog.csdn.net/clare504/article/details/9569347For a long while, or this solution solves the problem: The MySQL 1366 error is roughly described below 1. SQL Error:1366:incorrect String value: "\xe8\xaf\xa6\xe7\xbb\x86 ..." for column '

Add action: INSERT INTO One INSERT INTO statement can insert multiple recordsINSERT into insert_student values (one, ' Jet Lee ', ' Male ', '), ("Buruce Lee ', ' Male ', '", "Jacky", 25), (45 , ' crystal ', ' Famale ', 26); INSERT into supports

Need to use, tidy up a bit. (change to lowercase for easy viewing)View Table creation statement: show CREATE TABLE table_name;Change table name: ALTER TABLE old_table rename [to] New_table;//renameModify table data type: ALTER TABLE table_name

Delete from Uauth.user Join UAUTH.USERSP On uauth.user.id = Uauth.usersp.userid where Uauth.usersp.SPid = #{spid,jdbctype=varchar}When doing the associated delete such SQL statements, MySQL errorid= "DELETEBATCHUSEROFSP" parametertype=

#!/bin/bash# backs up all MySQL databases to full-Library full-scale backup?use mysqldump# defines the username and password for backing up the database user=rootuserpwd=s2# Define Backup database name # Get all database list Firstdbnames="$

1. after decompression, add MySQL to the environment variable path:D:\Java\mysql2. Modify the My-default.ini file# These is commonly set, remove the # and set as required. Basedir = D:\Java\mysql DataDir = d:\java\mysql\data# Port = .... # server_id

//Unpack the zip file.Warning & Error//Can ' t open the Mysql.plugin table. Please run Mysql_upgrade to create it. For more information, see Help and Support Center at http://www.mysql.com.Gtid table is not a ready-to-be used. Table '

In the previous section, creating a data table, this article describes the data insertion after the CREATE table:First, insert INTO ... values ... InsertINSERT INTO TableName (COLUMN1,COLUMN2,COLUMN3) VALUES (' character type 1 ', ' character 2 ', '

Count usage to find the total number of bars$sql= "SELECT count (*) as Total from E_user"; $query mysql_query ($sql$link); $res Mysql_fetch_array ($query); $count $res [' Total '];Max usage$sql= "SELECT Max (ID) as Maxid from E_user"; $sql= "SELECT

The first thing to know is what kind of shell you use for Mac OS x, using commandsEcho $SHELLIf the output is: CSH or TCSH, then you are using C Shell.If the output is: bash,sh,zsh, then your use may be a variant of the Bourne shell.Before Mac OS X 1

Recently deployed and tested a MYCAT+4 percona+tokudb horizontal split cluster, the previous application is to write a class of citation data into this library, only insert operation, the previous few days running state is also better.Since

Tables in the INFORMATION_SCHEMA database are simply read-only, cannot be updated, deleted, and inserted, and cannot be triggered because they are actually just a view, not a base table, and there are no associated files.There is a table tables in

Install mysqldata library in linux --tar.gzpackage decompress installation method, mysqltar.gz There are multiple installation methods for the mysqldata library. This document only describes how to decompress the tar.gz package on the linux

Mysql limit paging query optimization statement, mysqllimit When querying by page in mysql, limit queries are generally used, and orderby is usually used in queries. However, when the table data volume is large, for example, the query statement

Centos 6.5 Percona 5.6.27 Tokudb configuration, centospercona Reference https://www.percona.com/doc/percona-server/5.6/tokudb/tokudb_installation.html # Wget

Basic concepts of binary and redo log files in MySQL Binary logBinary logs record all operations that perform changes to the database. Binary logs have the following functions: 1. recovery 2. replication) Start of binary log: configure the parameter

MySQL index and slow query optimization tutorial shared by the technical team of Meituan network, mysql Index With outstanding performance, low cost, and rich resources, MySQL has become the first choice of relational databases for most Internet