CODE EXAMPLE FOR SQL

mysql procedures

delimiter //
CREATE PROCEDURE [IF NOT EXISTS] nameOfProcedure (IN variable1 [dataType], OUT variable2 [dataType])
BEGIN
	[statements]
END //
delimiter ;
// Then you can call the procedure with:
CALL nameOfProcedure([variable1], @variable2Out);
// Then you can use variable2Out;
SELECT @variable2Out;