You can set parameters for a stored procedure : Procedure « Procedure Function « MySQL Tutorial

1.	Introduction
2.	Select Query
3.	Database
4.	Table
5.	Table Join
6.	Subquery
7.	Insert Update Delete
8.	Logic Operator
9.	View
10.	Data Types
11.	Procedure Function
12.	Cursor
13.	Trigger
14.	Date Time Functions
15.	Comparison Functions Operators
16.	Aggregate Functions
17.	Cast Functions Operators
18.	Control Flow Functions
19.	Encryption Compression Functions
20.	Information Functions
21.	Math Numeric Functions
22.	Miscellaneous Functions
23.	String Functions
24.	Regular Expressions
25.	Data Dictionary
26.	MySQL Utilities
27.	Privilege

11.5.2.You can set parameters for a stored procedure

[IN|OUT|INOUT] <name> <data type>

If you don't specify IN, OUT, or INOUT for the parameter, it will default to IN.

An IN parameter is passed into the stored procedure to use internally.

An OUT parameter is set within the procedure, but accessed by the caller.

An INOUT parameter is passed into the procedure for internal use, but is also available to the caller after the procedure has completed.

The name and data type of the parameter are used in the stored procedure for referencing and setting values going in and out of the procedure.

The data type can be any valid data type for MySQL.

11.5.Procedure
	11.5.1.	The CREATE PROCEDURE Statement
	11.5.2.	You can set parameters for a stored procedure
	11.5.3.	Using an OUT parameter.
	11.5.4.	The stored procedure characteristics include a number of options for how the stored procedure behaves.
	11.5.5.	Creating a Single-Statement Procedure
	11.5.6.	Calling a Single-Statement Procedure
	11.5.7.	Creating a Multistatement Stored Procedure
	11.5.8.	The ALTER statement lets you change the characteristics of a stored procedure
	11.5.9.	To remove a stored procedures, use the DROP statement
	11.5.10.	ALTER PROCEDURE and ALTER FUNCTION Syntax
	11.5.11.	DROP PROCEDURE and DROP FUNCTION Syntax
	11.5.12.	Stored Procedure Permissions

All other trademarks are property of their respective owners.