MySQL

win7+vs2010 Source code compilation mysql recently, because in the internship, the focus is on some database development, in order to better understand the implementation mechanism of the database. Now it's the idea to study the source code of

We all know installing MySQL client with yum install MySQL, but sometimes you can't find a resource using the Yum commandThis machine download files, manual installation of the most reliable, a command to take care of. There are two files that need

New Date (); New SimpleDateFormat ("Yyy-mm-dd HH:mm:ss"); int seconds=1481194381; Long millions=new Long (seconds) *1000; Nedate.settime (millions); System.out.println (Dateformat.format (nedate));Time

http://wentao365.iteye.com/blog/1740691Data storage Evolution idea one: library single tableA library single table is the most common database design, for example, a user table is placed in database db, and all users can be found in the user table

Http://www.jb51.net/article/103841.htm1. Download the website. DMG installation Package2. Install MySQLAfter the download is complete, click Install, confirm all the way, and wait for the installation to succeed.During the installation process,

First say the specific method:Operate in MySQL firstSet global wait_timeout = 60;Set global interactive_timeout = 60;then modify (/etc/my.cnf) in the config file:[Mysqld]Interactive_timeout = #Wait_timeout = 120Wait_timeout--refers to the number of

Linux under Install configuration MySQL serverFirst, installation Environment ============os:centos6.8Mysql:mysql-5.7.16-linux-glibc2.5-x86_64.tar.gzinstallation directory:/usr/local/mysql57installed with the root user. Second, installation steps ===

1 modificationslogin settings for MySQL# VI/ETC/MY.CNFAdd a sentence in [mysqld]:skip-grant-tables2 Restart mysqld # /etc/init.d/mysqld restart  stopping MySQL: [OK] Starting MySQL: [OK] 3 Log in and modify the root password of MySQL #

To answer the index's impact on database performance, a simple experiment was done.Test environmentMySQL 5.7.10 InnoDB 1 million random dataTable structureCREATE TABLE ' table1 ' ( ' id ' int (one) unsigned not null auto_increment, ' col1 '

First step: Create a new data table:------------------------------------------------------------------------------------------------------------Use ESHOP1;CREATE TABLE C_goods (Ccode int PRIMARY KEY,CNAME varchar (200));Add dataInsert into C_goods

We often have this need to replicate the MySQL database on one server to other machines, such as a database migration.    The simplest way to do this is to use the off-the-shelf tools provided by MySQL: Mysqldump.    When using mysqldump, you need

InstallationYum Install Mysql-serverSet boot upChkconfig mysqld onStart the MySQL serverService mysqld StartSet the initial password for rootmysqladmin-u root password ' 123456 '#为hive建库hiveCreate DATABASE hive DEFAULT CHARSET UTF8 COLLATE

Here are four ways to use fuzzy queries in MySQL:1,%: Represents any of 0 or more characters. Can match any type and length of the character, in some cases, if Chinese, please use two percent sign (%).For example SELECT * from [user] WHERE u_name

Mysql-u root-p# allows local IP access to localhost, 127.0.0.1# insert into Mysql.user (Host,user,password) VALUES (' localhost ', ' Zhouz ', p Assword (' 1234 ')); # Allow extranet IP access # INSERT INTO Mysql.user (Host,user,password) VALUES ('% '

Download Xtrabackup:# wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.4.6/binary/tarball/ Percona-xtrabackup-2.4.6-linux-x86_64.tar.gzDecompression Software:# tar xvf percona-xtrabackup-2.4.6-linux-x86_64.tar.gz-c/usr/local/#

1, first confirm whether the local can connectEmpower users with local ability to connectMysql>grant all privileges on * * to ' root ' @ '% ' identified by ' Youpassword ' with GRANT option;Mysql>flush privileges;2. Open/ETC/MY.CNFComment out the

1. mysql InstallationCheck if the system has MySQL installedQuery command: rpm-qa|grep-i MySQLDelete command: rpm-e RPM package Name (the name is the name that was found in the previous command)Install Command: RPM-IVH RPM package Name2. Path　　3.

Pt-heartbeat (percona toolkit), perconatoolkitPt-heartbeat is a percona tool used to monitor master-slave latency. Most of our MySQL architectures are still based on master-slave replication, such as MHA, MMM, and keepalived solutions. In the master-

On myeclipse, the question about webservice Interface release by spring + mybatis + axis2 and how it is implemented by myself is mybatisaxis2. Prerequisites: Suddenly one day this month, a project was connected to the interface that needed to be

Pt-query-digest (percona toolkit), ptquerydigestPt-query-digest can analyze MySQL query information through logs, processlist, and tcpdump. The basic syntax is as follows: pt-query-digest [OPTIONS] [FILES] [DSN]  Pt-query-digest is a simple and easy-