Add by Zhj: In the MySQL5.6 of some parameters have been increased, see http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.htmlOriginal: http://mageedu.blog.51cto.com/4265610/1062628Marco Education Linux operation and maintenance
Use SELECT ... Into statement assigns a value to a variableIn the MySQL stored procedure, you can use SELECT ... The INTO statement assigns a value to the variable, which is queried in the database and assigns the resulting result to the variable.
Server system Variables (System variable)The MySQL system variable (systems variables) refers to the various system variables of the MySQL instance, which are actually some system parameters that are used to initialize or set the database to occupy
1. download MySql
1. download MySql
Open http://www.mysql.com/downloads/mysql/#downloads download in browser
My downloaded version is Red Hat 5 version of http://www.mysql.com/downloads/mirror.php? Id = 407552
Upload the file to the server, or
In common: case-insensitive, both variables
Different points: Global variables are read-only in the system and can be modified in a configuration file
Terminology classification for MySQL variables:
1. User variable: Starting with "@" in the form
Tag: color is medium tar local str local SSI GlobalDescription: Now on the market defined variables of the tutorial and books are basically stored procedures are described, but the stored procedure variables can only be used in begin...end block,
As far as my current tests are concerned, this vulnerability has two reasons:1. Use the default mysql installation method. The mysql User does not have the permission to access the configuration file/etc/mysql/my. cnf;2. If selinux or apparmor is
18.2.1 MySQL server has gone away errors related to Lost connection to server during query.
The most common cause of the MySQL server has gone away error is that the server times out and closes the connection. By default, if nothing happens, the
MySQL database programs that can run on a local version of Windows have been available from MySQL AB since version 3.21, and the daily download percentage of MySQL is very large. This section describes the process of installing MySQL on Windows. The
MySQL Format statement specificationHow do I log into your database?Example!If you are compiling the installation of the flowers, then you have to compile the installation of the directory to go, my is installed into the/usr/local/mysql database: Cd/
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