MySQL

1. Create the database and the table with the following code:Create a database functionfunction Createdb ($DBname) {$query = "CREATE DATABASE $DBname";Return Querycommite ($query);}CREATE table functions, columns in tables need to define their own

Installation method is divided into rpm and source code compiled installation Two, this article is the use of MySQL source code compilation, the compiler uses CMake. The software requires mysql-5.5.29.tar.gz and cmake-2.8.10.2.tar.gz, please

ubuntu10.04 to modify the MySQL datadir problemtransferred from: http://blog.sina.com.cn/s/blog_4152a9f50100mq5i.html Yesterday due to the server space is tight, you need to move MySQL datadir from the default/var/lib/mysql to/usr/local/mysql,

One way to monitor running MySQL is to check the status of MySQL running.(1) QPS (query amount per second)QPS = Questions (or Queries)/secondsMySQL > Show global status Like "question%";(2) TPS (transaction volume per second)TPS = (com_commit +

centos6.6 Compiling and installing MySQL5.6"The content described in this document is intended for common MySQL database environment deployments such as company testing/production"One: Prepare for the environment before deployment:1.1 Related

Set up MySQLFirst copy the Mysql.server to/ETC/INIT.D directory named mysql# CP/own installation directory/mysql/share/mysql/mysql.server/etc/init.d/mysql then go to/etc/ RC2.D directory, which is the default boot level for Debian. After

Here are some of the more important suggestions:1. Choose the right storage enginein MySQL, for example, there are two storage engines MyISAM and InnoDB, each with a few pros and cons. MyISAM is suitable for applications that require a large number

For a detailed explanation of the page, see http://blog.csdn.net/u011225629/article/details/46775947View Code Print 1 SELECT * FROM table ORDER by ID LIMIT 1000, 10;The above SQL statements in principle and in the actual operation is not a problem,

numeric type, string type, date Time type numeric types (integers, decimals):　 Zerofill: The number of digits is not sufficient for 0 padding. ALTER TABLE t1 MODIFY id1 int zerofill; Decimal (floating point, fixed point): floating

1. Commands that show some parameters for slow queries: show variables like '%slow% '; results2. The above four parameters mean:Log_slow_queries off means "slow query" is "off state"Slow_launch_time 2 means "The query time is more than 2 seconds to

ps-a | grep-i mysqlkill list of processesservice MySQL startmy problem is solved.----------------------------------------------Fedora8 Start MySQL Error:ERROR 2002 (HY000): Can ' t connect to local MySQL server through socket

Password problem handling during installationA RANDOM PASSWORD have BEEN SET for the MySQL root USER!You'll find that password in '/root/.mysql_secret '.Vi/root/.mysql_secretMysql-uroot-p Random PasswordUPDATE user SET Password=password (") where

Configuration of the 1\xampp phpMyAdmin1. Open "Path/phpmyadmin/libraries/config.default.php" to find the relevant item and modify it to the following:$cfg [' pmaabsoluteuri '] = ' http://218.206.205.35/phpmyadmin/';$cfg [' blowfish_secret '] = '

$link =mysql_connect ("IP", "Database name", password), mysql_select_db ("library name", $link); mysql_query ("Set names UTF8"); $sql = "SELECT ID, Name from brand "; $arr = mysql_query ($sql); Execute SQL statementPDO Connection Database

Mysqlslap comes with the parameter:--concurrencyRepresents the number of concurrent, multiple can be separated by commas, concurrency=10,50,100, the number of concurrent connection threads are 10, 50, 100 concurrency respectively.--enginesRepresents

Title1.100W data insertion, define while loop to execute 100W times from the 1-100w,insert statement, run from 11 o'clock to 10 in the morning of the next day, a total of 11 hours!!!1 DELIMITER $$2 3DROP PROCEDUREIFEXISTS ' Havefun '.'

This article is a supplement to the previous article, mainly around the following two points, the implementation of One-connection-per-thread and the use of epoll in the thread pool. One-connection-per-threadDepending on the scheduler_functions

ALTER TABLE????? ??? ??? ???? ?? (Heap, MyIsam, InnoDB ...)? ???? ??? ???. ?? ??? ?? ??? ??? ?? ??? ?? ????? ???? ????.[???? ?? ????]??) ALTER TABLE [????] type=[??????]"??? ???"?? Heap, MyIsam, InnoDB ...??? ???? ^^??? MyIsam?? ??? MyTable?? ???? ??

transferred from: http://blog.csdn.net/codeforme/article/details/5539454foreign KEY constraints The meaning of the child table:Insert/update is not allowed on a child table if a candidate key is not found in the parent tableWhat foreign KEY

If you need to have 192.168.2.3 's test user access to all of the local databases, the MySQL command is as follows MySQL>GRANTallprivilegeson*. * to ' Test ' @ '192.168. 2.3′identifiedby '123456 '; MySQL>privileges;Grant Syntax description Grant