mysql variable select

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

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

Variable assignment in mysql, mysql variable assignment Http://www.cnblogs.com/qixuejia/archive/2010/12/21/1913203.html   Variables in SQL server must be affirmed first and then assigned values: The local variables are identified with one @ and the

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

MySQL has become one of the most widely used databases on the network, especially for Web applications. it occupies the absolute advantage of small and medium applications. All of this comes from its small and easy-to-use, secure and effective, open

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,

String function string comparison function if the result length is greater than the maximum value of the max_allowed_packet system variable, the return value of the string value function is NULL. See section 7.5.2 "Adjust server Parameters ". String

Generally, the entire string is used as the operation object, for example: search for a substring in a substring, obtain a substring, insert a substring at a certain position in the substring, and delete a substring. Generally, the entire string is

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