MySQL

1, my friend, look for me. Slow SQL statements SELECT pg.product_goods_id, pg.product_id, Pg.pdt_code, Pg.pdt_name, Pg.brand_name, Pg.refere Nce_price, Pg.deposit, Pg.sale_status, Pg.is_delete, Pg.create_date, Pg.create_operator, Pg.update_date,

Reprint http://chenzhou123520.iteye.com/blog/1863407The previous article, "MySQL pessimistic lock summary and practice" talked about the MySQL pessimistic lock, but pessimistic lock is not suitable for any scenario, it also has some shortcomings,

The processing of dates in the work is often encountered, the requirements may be varied, so the focus is introduced.1. Get the current dateSelect Now () -- results: 2015-10-28 22:41:11 Select Now (), SLEEP (3), now ()-- results 2015-10-28 22:43:34

Tungsten-replicator Technology Exchange Group: 376068310A planning host:192.168.67.128 #mysql主机 (pre-installed, installation steps see previous blog) 192.168.67.129 #mongodb主机 (pre-installed, installation steps see previous blog)Two preconditions: (

MYSQLDUMP-UROOT-P ABC > ABC. SQL(Export the database ABC to ABC.) SQL file)When prompted for a password, enter the password for the database user name (if you export a single table, enter the table name after the database name)If you are prompted

PhpMyAdmin tries to connect to the MySQL server, but the server rejects the connection. You should check the host, user name, and password in the configuration file and confirm that the information is consistent with the information given by the

This article describes some MySQL SQL statements for querying, including by year, quarter, month, week, day and so on, the need for friends, you can refer to. I. Annual query query data  select *from blog_articlewhere year (From_unixtime

First of all, why divide the tableWhen a piece of data reaches millions of, you spend more time searching for it, and if you have a joint query, I think it's possible to die there. The purpose of the sub-table is to reduce the burden on the database

There are two main ways in which MySQL transactions are handled: 1, with Begin,rollback,commit to achieveBegin a transactionROLLBACK TRANSACTION RollbackCOMMIT TRANSACTION Acknowledgement2, directly with set to change the MySQL automatic submission

One. Install MySQL1.mysqlhttp://dev.mysql.com/downloads/mysql/my machine is Mac 10.8, so use MYSQL-5.6.10-OSX10.7-X86_64.DMG to install the package;2. The installation package is located in the hard drive image (. dmg) file, you must first

MyISAM and InnoDB explanationInnoDB and MyISAM are the two most common table types used by many people when using MySQL, both of which have pros and cons, depending on the application. The basic difference is that the MyISAM type does not support

Download percona-server-5.6.26-74.0.tar.gzInstall some of the necessary software with Yum:Yum-y install make gcc gcc-c++ cmake bison-devel ncurses-devel gcc \autoconf* automake* zlib* fiex* libxml* libmcrypt* libtool-ltdl-devel* \OpenSSL

The previous article thanks to "Mysql, MariaDB traditional master-slave cluster Configuration", the technology has been very mature. Starting from Mysql5.6 and MariaDB10.0, with the new master-slave scheme Gtid, but the two systems to this version

This article is from the "Spin Wood Technology Blog" blog, please be sure to keep this source http://mrxiong.blog.51cto.com/287318/1651098I. Numeric typeMySQL supports all numeric types in standard SQL, including strict data types

Recently, the customer has a demand, the younger brother for the operation of the thing is also dabbler, so determined to explore the next. It was a night of torture and finally it was done. Because is two different server, originally wanted to use

Http://www.cnblogs.com/bugY/archive/2012/07/06/2578972.htmlWhat is PearFrom Baidu Encyclopedia: Pear is the abbreviation for PHP extension and application library (the PHP Extension and application Repository). It is a code repository for PHP

Connection conn =NULL; String URL= "Jdbc:mysql://xxx.xx.xx.xx:3306/connection"; Try{class.forname ("Com.mysql.jdbc.Driver"); System.out.println ("Load Successfully"); String User= "Root"; String PassWord= "Root"; Conn=drivermanager.getconnection

A.ShowTables orShowTables from database_name; --Displays the names of all tables in the current databaseB.ShowDatabases --DisplayMySQLIn all name of the database C.  show  columns from table_name from database_name; or Show  columns from

1, when the function mysql_connect the first three parameters ( server username password）相同，并且第四个参数（new_link）不传递时候，重复调用 mysql_connect will return the same connection.PHP codePHP $db mysql_connect (' localhost ', ' root ', ' root '); Var_dump

Project Address Https://git.oschina.net/rushmore/zbusLast time we talked about the core API of Zbus network communication :Dispatcher -- responsible for -nio Network event Selector engine management, load Balancing for Selector engine Ioadaptor-