MySQL

Refactoring codeHttp://mysql.taobao.org/index.php/Patch_source_code#Add_flashback_feature_for_mysqlbinlogThere are three versions, test 5.5.18_flashback_all.diff in percona5518 version will not error, MySQL official version can only use

When using the MySQL client, we will often appear a problem, that is, the original good text, how to enter the garbled after it?This problem occurs: the first reason: Maybe this is our new installation of a MySQL, not configured, the second reason

MySQL Change portModify/ETC/MY.CNFAdd port=3308Modified as follows[Mysqld]Datadir=/var/lib/mysqlSocket=/var/lib/mysql/mysql.sockport=3308User=mysql# Disabling Symbolic-links is recommended to prevent assorted security

The Web server has a vulnerability that can easily be scanned and tried to inject MySQL:Today try to scan the real discovery site was injected into the test: paste a piece of code:GET/?fbconnect_action=myhome&fbuserid=1+and+1=2+union+select+1,2,3,4,5

Two-master actually is a replication, just introduced some new topological structureThere are two modes of primary-master replication:Active-Active Mode primary-primary replication (Master-master in active-active mode) master-master replication

Dbconn.setautocommit (FALSE); Set to non-auto-commitDbconn.commit (); submitDbconn.rollback (); rollbackALTER TABLE XXX engine = InnoDB;MySQL table type Myisam,innodb detailed1. If your data performs a large number of inserts or update, for

MySQL dual master self-growth conflict processing There are some differences between multi-master and master-slave replication, because there can be write access to the server in the host, so design to self-growing duplication problem (multi-master

create table  ' sq '   (' id '  int , ' user_id '   varchar , ' Userid_seq '  varchar  (); insert into  ' sq '   (' id ',  ' user _id ',  ' userid_seq ')  values (' 1 ', ' Zhang ', NULL);insert into  ' sq '   (' id ',  ' user_id ',   ' Userid_seq ')

Enable mysql automatically when Mac is started Before mysql was installed, the installer automatically added system services and started mysql when the system was started. However, after upgrading Mac OSX to 10.10.1 Yosemite today, we found that

Shell batch import mysql database Due to project collaborative development, my colleague sent an SQL file of the project and opened it in a directory containing hundreds of databases. Each database is used as a separate file. Each SQL file

MySQLInnoDB storage engine table (1) This section describes the logical storage and implementation of InnoDB Storage engine tables. This section focuses on how data is organized and stored in tables. 1. index organized table) In the InnoDB Storage

Summary of Common commands for MySQL database operations and summary of common mysql commands Create a database The simplest method: Copy codeThe Code is as follows:Create database my_db; Or: Copy codeThe Code is as follows:Create database if not

Create and Delete tables in MySQL Create a table Simple Method Copy codeThe Code is as follows:Create table person (Number INT (11 ),Name VARCHAR (255 ),Birthday DATE); Or Copy codeThe Code is as follows:Create table if not exists person (Number INT

MySQL returns the update value (RETURNING)In SQL writing, such as updating a row of records, you must obtain the updated row. From the perspective of the program itself, there is no difficulty, it is a big deal to cache this line, and direct access

MFC-related MYSQL database operations I remember someone said that the current software is basically connected to the database. If a software is not connected to the database, it will basically be useless. Although such a statement is somewhat

How to configure Mysql to allow remote access in Linux The procedure is very simple. The procedure is as follows: 1. Go to mysql: /Usr/local/mysql/bin/mysql-u root-p 2. Use the mysql database: Use mysql; 3. view the user table: SELECT 'host',

MySql basic operation 1Basic MySql operations This example is a command line operation on windows.First, create a new super Administrator Account in the mysql database. An error is returned when you log on to mysql.First, summarize the basic mysql

Brief description and example of MySQL Replication Master-slave replication is widely used in MySQL. It is mainly used to synchronize data on one server to multiple slave servers. It can be used for load balancing, high availability and failover,

Exclusive thread for MySQL memory usage, exclusive mysql Memory thread Preface In MySQL, thread exclusive memory is mainly used to store exclusive data for various operations by client connection threads, such as thread stack information, grouped

MySql Server System variables and status variables Server System Variables The server maintains many system variables that indicate their configurations. All variables have default values. You can set the options in the command line or option file