MySQL

4.1 Download the required version, here the system platform for the rhel6.4 32-bit system, so take mysql-proxy-0.8.3-linux-glibc2.3-x86-32bit.tar.gz as an example.# Tar XF mysql-proxy-0.8.3-linux-glibc2.3-x86-32bit.tar.gz-c/usr/local# cd/usr/local#

Since Sql_slave_skip_counter doesn ' t work with GTID we-need to find a-to-ignore that transaction. The It is creating a new empty transaction with it the GTID we want to skip.STOP SLAVE; SET Gtid_next="7d72f9b4-8577-11e2-a3d7-080027635ef5:5";

After reloading the system, to install a MySQL server, found to add data, has been wrong, check its cause, the original encoding problem. Google a bit, but it is not the same, maybe the database version of the problem it.To view the database version:

Today used in the MySQL IsNull only found him and MSSQL in a little difference, now briefly summarize:The usage of isnull,ifnull,nullif in MySQL is as follows:Usage of IsNull (expr):If expr is null, then the return value of IsNull () is 1, otherwise

First of all, for example:There is an article table with a Type field, which stores the article type, there are 1 headlines, 2 recommendations, 3 hotspots, 4 graphics and so on.Now there is an article that he is a headline, hot, or graphic, type in

An index is a special kind of file (an index on a InnoDB data table is an integral part of a table space), and they contain reference pointers to all records in the datasheet.Note:[1] The index is not omnipotent! Indexing can speed up data retrieval

In the application under Mac, it is generally impossible to find the MySQL installation file for direct deletion, so it is usually necessary to open the command line tool terminal and delete it using the following command:1 sudo rm/usr/local/mysql2

MySQL does not have a Boolean type. This is also a very strange phenomenon. Cases:Create Table xs ( intprimarykey, bl Boolean)This is a good way to create a success, but looking at the statement after the build, you will find that MySQL replaced

Failure phenomena:Enter the slave server and run:Mysql> Show Slave

Configure the character encoding for Mysql under Ubuntu. After installing Mysql, the system default character encoding is latin1, the input is Chinese, but the output is a bunch of garbled. Now all we have to do is set MySQL's default character

Data type :Data types are data characteristics of columns, stored procedure parameters, expressions, and local variables, which determine the storage format of data and represent different types of information.————————————————————————————————————————

Good mind is better than rotten pen, a lot of things at that time did not remember, after the forgotten, the next time you have to waste a lot of time to solve. Today again encountered the change MySQL default character set encoding problem, toss a

Take a look at the description of OPTIMIZE in the manual:OPTIMIZE [LOCAL | No_write_to_binlog] TABLE tbl_name [, Tbl_name] ...If you have deleted a large part of the table, or if you have made many changes to a table with variable-length rows (a

PHP compiled under linux add MySQL extensionIn the use of this problem occurs, look at the phpinfo found no MySQL extension.The steps are as follows:1 access to the PHP installation package directoryCD

MySQL Master-slave replicationExperimental environmentMaster: 192.168.110.33From: 192.168.110.59Iptables and SELinux disabledMaster: Server-side1. Install and initialize# yum Install-y mysql-mysql-server#/etc/init.d/mysql start#

Mysqlslap is MySQL's own benchmark tool, the advantages: query data, simple syntax, flexible and easy to use. The tool can simulate multiple clients concurrently issuing query updates to the server. The performance test data is given and the

The company has new requirements, iOS client to go online comments can use emoji expression function, before MySQL 5.5, UTF-8 encoding only support 1-3 bytes, starting from MySQL 5.5, can support 4 byte UTF encoding utf8mb4, A character can support

Data type confusion: what is an int (11 )?, Confusionint Http://everythingmysql.ning.com/profiles/blogs/data-type-confusion-what-is-an   Over and over I see MERs that don't understand whatint(11)Really means. Their confusion is understandable.

Use yum to install mysql and centosyum in CentOS 7.0 The default database of CentOS7 is mariadb, which is not used to the configuration. Therefore, it is decided to change it to mysql. However, the yum source of CentOS7 does not seem to have mysql

Mysql gtid-based replication and MYSQLGTID Replication 1. Overview Mysql supports GTID replication starting from MYSQL5.6. Disadvantages of log point replication: Incremental synchronization is performed from the offset of the binary log. If an