MySQL

Pessimistic lock and optimistic lock are two common methods of resource concurrent lock design, and also a very basic concept in concurrent programming. In this paper, the two common locking mechanisms in the database data on the implementation of

The MySQL database was initialized yesterday, and today the boot is tuned, CONFIGUREDFirst check to MySQL boot no[[email protected] ~]# ss-lntup|grep MySQLConfigure/etc/rc.local to set MySQL to bootMethod One,[Email protected] ~]# vim/etc/rc.local#!/

----Database Initialization Script---Create a databaseCREATE DATABASE Seckill;---using the databaseUse Seckill;---Create a second kill inventory tableCREATE TABLE Seckill (' seckill_id ' bigint not NULL auto_increment COMMENT ' commodity stock id ','

1.mysql master-Slave, master-master formwhere the master-slave form, the main responsible for writing, from the responsible read, the main database if you hang up the other one from the database, change the main library slowerThe main master form

1. Installing OPENJDKyum list java*yuminstall java-1.7. 0-openjdk*--version2. Install Tomcatcd/usr/localwget https://mc.qcloudimg.com/static/archive/ fa66329388f85c08e8d6c12ceb8b2ca3/apache-tomcat-7.0.77.tar.gztar -zxf apache-tomcat-7.0. . Tar . GZ

In my two blog posts, one is the installation, one is to configure remote login,Tim June Blog Original>> June Blog Original http://www.cnblogs.com/tijun/So the information in my MySQL user table is as follows;Mysql>Use MySQL; Reading Table

MySQL InnoDB engineShared Lock (S) Select ... lock in share mode, with shared lock data, other places can only be shared lock, cannot add exclusive lock.Exclusive Lock (X) Select ... for update, Update,delete,insert automatically adds exclusive

1, installation to ensure the following system-related library filesGCC gcc-c++ autoconf automake zlib* libxml* ncurses-devel libmcrypt* libtool* (libtool-ltdl-devel*)Yum Install GCC gcc-c++ autoconf automake zlib* libxml* ncurses-devel libmcrypt*

One, the operation of the database 1. Create a libraryCreate DATABASE library NameCreate database name Character Set encodingCreate an encodedView Code:2. Delete a libraryDrop DATABASE Database name3. Using librariesUse library name4. View the

Data preparationdrop table if exists class;CREATE TABLE Class (class_no Int (2) unsigned Zerofill primary key auto_increment comment ' class number ',Class_name varchar (+) NOT null comment ' class name ');INSERT into class values (1, ' Pui gifted

Transferred from: http://www.jquerycn.cn/blog/mysql/What is the meaning of this int[m], when defining a numeric data type, you can specify an integer value (such as: Int (m), a maximum of M of 255) in the key brackets to display the maximum display

On the slave server, use the following commandMysql> show Slave status\g;The following conditions are displayed:Slave_IO_Running:YesSlave_SQL_Running:NoIndicates that slave is out of syncWorkaround One (ignore the error, continue syncing):1, first

First, DDL1. Create a databaseCreate Database name* database name can not be Chinese, the number is not normal English , the keyword will be automatically capitalized2. Delete DatabaseDrop Database name3. Using the Database Use database name* If

Translation: SET NAMES This article is a translation of the mariadb official manual: set names. Original article: https://mariadb.com/kb/en/set-names/Https://mariadb.com/kb/zh-cn/set-names/ I submitted to the MariaDB official manualSyntax SET NAMES {

Error in mysqldump export and mysqldump Export The following error is reported when executing the mysqldump command:[Root @ localhost ~] # Mysqldump-uroot-p-d test> test. SQLMysqldump: Got error: 2002: Can't connect to local MySQL server through

MySQL 5.7 dual-master synchronization table implementation process details, mysql5.7 Preface Recently, due to the company's own business, some tables between the two databases need to be synchronized in two directions in real time, and any database

Mysql-based Sequence implementation method and mysqlsequence implementation The team changes the new framework. All new businesses use the new framework, or even the new database-Mysql. Oracle has been used for the past. The serial numbers provided

For details about the floating-point to serial-type problems in MySQL, mysql floating-point Preface This article mainly introduces a problem that MySQL encountered when converting the floating point type to the standby type. I will share it for your

MySQL combined index function and usage instance analysis, mysql instance analysis This article describes the functions and usage of MySQL joint index. We will share this with you for your reference. The details are as follows: A joint index is also

How to install mysql 5.7.11 in Win7, win75.7.11 Operating System: win7 64-bit flagship Edition Mysql package: mysql-5.7.11-winx64.zip 1. decompress the MySQL package Decompress the downloaded MySQL package to the custom directory. The decompressed