Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
System variables vs User-defined variables in MySQL?
System Variables
The system variables are tightly typed variable. These are also known as global specific variable.
The system variable can be initialized somewhere in global and contains the value of system variables until the server restarts. This value will destroy whenever you restart the MySQL server. The predefined system variable is prefixed with symbol @@.
User-defined Variable
The user defined variable is also known as session-specific variable. It is a type of loosely typed variable which can be initialized somewhere in session and contains the value of user defined variable until session ends. The user defined variable is prefixed with symbol @.
For Example:
@anyVariableName
Updated on: 30-Jul-2019
314 Views
Advertisements