MySQL Variables
Mysql variables create a user-defined variable, you use the format @variable_name, where the variable_name consists of alphanumeric characters. The maximum length of the user-defined variable is 64 characters as of MySQL.

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MySQL Variables
Mysql variables create a user-defined variable, you use the format @variable_name, where the variable_name consists of alphanumeric characters. The maximum length of the user-defined variable is 64 characters as of MySQL.
MySQL Versions
Versioning is a process of categorizing either unique version names or numbers to the unique set of software program as it is developed and released. The commonly used version name for denoting the initial release of a software or program is version 1.0.
MySQL Workbench (Download and Installation)