MySQL 8.4 Reference Manual :

This statement declares local variables within stored programs. To provide a default value for a variable, include a DEFAULT clause. The value can be specified ...

The DECLARE statement is used to define various items local to a program: Local variables. See Section 15.6.4, “Variables in Stored Programs”.

User variables can be assigned a value from a limited set of data types: integer, decimal, floating-point, binary or nonbinary string, or NULL value. Assignment ...

In MySQL, we can use both SET and SELECT commands to declare the variable. The assignment operator also has no restrictions: we can use either = or := , ...

2012年8月1日 — There are mainly three types of variables in MySQL: User-defined variables (prefixed with @ ):. You can access any user-defined variable ...

2012年8月1日 — Does anyone know what I've done wrong where declaring that INT variable? It's probably something incredibly basic...! Thanks very much in ...

This tutorial introduces you to MySQL stored procedure variables and shows you how to declare and use the variables.

This MySQL tutorial explains how to declare variables in MySQL with syntax and examples. In MySQL, a variable allows a programmer to store data temporarily ...

The MySQL DEFAULT keyword can be used while declaring a variable to set the default value of the variable. This is an optional parameter, if we do not define ...