Alguien sabe si esto está bien o mal? Y su explicación! Por favor

Question

DELIMITER //

CREATE PROCEDURE country_hos

(IN con CHAR(20))

BEGIN

SELECT Name, HeadOfState FROM Country

WHERE Continent = con;

END //

DELIMITER ;

CALL country_hos('Europe');

Answer 1

DELIMITER is a command line instruction for defining a custom statement delimiter. When defining a block of instruction (procedure etc), where use of default statement delimiter may be necessary, a customized statement delimiter is needed in order to prevent the SQL engine from misinterpreting where the block actually ends, if the engine finds a statement delimiter inside the block.

More about it:

https://stackoverflow.com/questions/10259504/delimiters-in-mysql