update two tables in single query in mysql

Currently, MySQL databases are widely used in many OLTP scenarios, and there are many different ways to use them. From the database business requirements, architecture design, operational maintenance, and then to the expansion of the migration,

In order to better optimize MySQL in high concurrency, it is necessary to understand the locking table mechanism when MySQL query is updated.I. OverviewMySQL has three levels of Lock: page level, table level, row level.MyISAM and MemoryStorageThe

1.MySQL Engine Overview 1.1 What is a storage engineWhen we record a video file, it can be converted to different formats such as mp4,avi,wmv, and on the computer's disk will also exist in different types of file system Windows common Ntfs,fat32,

MySQL performance tuning and Architecture Design-Chapter 1 Performance Design-MySQL Replication and replication Optimization Chapter 1 scalability design-MySQL Replication Preface: MySQL Replication is a unique feature of MySQL. It can completely

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the

1. Full backup and incremental backup 1.1 full-scale backupFull-volume data is all the data in the database, and a full backup is the backup of all the data in the database.Back Up all libraries:mysqldump -uroot -p123456 -S /data/3306/mysql.sock -F -

Abstract: This article describes how to optimize SQL queries. You can manually use the EXPLAIN statement to check the efficiency of SQL queries. In addition, some principles for optimizing SQL statements are described, mainly about how to optimize

-- General steps to optimize SQL -- 1. Learn the execution frequency of various SQL statements through show status and application features/* provide server status information through show status, you can also use the mysqladmin extended-STATUS

Summary: Basics of the CentOS 6.5 MySQL database and in-depth explanationsOriginal: http://tanxw.blog.51cto.com/4309543/1395539ObjectiveEarly MySQL AB was sold to Sun for $1 billion in 2009, but unfortunately sun was acquired by Oracle in 2010, and

This article goes to: http://blog.csdn.net/cug_jiang126com/article/details/49824471In the mysqldump process, before in fact has not been very understanding why add--single-transaction can ensure that the InnoDB data is exactly the same, and MyISAM