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
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
1. Global & DynamicExample:slow_query_log? Display the value of the variable:Currently set to OFF? Set the variables of the global &dynamic type in a session:As you can see, a variable of type global must have its value set by the Global keyword. ?
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
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,
Variable assignment in mysql, mysql variable assignment
Variables in SQL server must be affirmed first and then assigned values:
The local variables are identified with one @ and the
This article describes MySQL log management in detail. This article describes log types, log functions, and common server variables related to MySQL logs, if you need it, you can refer to the log file. it is very important for a server. it records
mysql> show global status; Can list MySQL server running various status values, my personal preferred usage is show status like ' query value% '; One, slow query mysql> show variables like '%slow% '; +------------------+-------+ | variable_name
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
[Back To Directory] vernacular C ++
2.14. Code: blocks configuration -- Global PATH variable
In this chapter, we have installed many extension libraries. Next, we will write some code to call these libraries in the program, then, the compiler
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