mySQL SELECT anniversaires à venir

Pour obtenir tous les anniversaires dans les 7 prochains jours, ajoutez la différence d'année entre la date de naissance et aujourd'hui à la date de naissance, puis recherchez si elle tombe dans les sept prochains jours.

SELECT * 
FROM  persons 
WHERE  DATE_ADD(birthday, 
                INTERVAL YEAR(CURDATE())-YEAR(birthday)
                         + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                YEAR)  
            BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY);

Si vous souhaitez exclure les anniversaires d'aujourd'hui, modifiez simplement > à >=

SELECT * 
FROM  persons 
WHERE  DATE_ADD(birthday, 
                INTERVAL YEAR(CURDATE())-YEAR(birthday)
                         + IF(DAYOFYEAR(CURDATE()) >= DAYOFYEAR(birthday),1,0)
                YEAR)  
            BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY);

-- Same as above query with another way to exclude today's birthdays 
SELECT * 
FROM  persons 
WHERE  DATE_ADD(birthday, 
                INTERVAL YEAR(CURDATE())-YEAR(birthday)
                         + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                YEAR) 
            BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY)
     AND DATE_ADD(birthday, INTERVAL YEAR(CURDATE())-YEAR(birthday) YEAR) <> CURDATE();


-- Same as above query with another way to exclude today's birthdays 
SELECT * 
FROM  persons 
WHERE  DATE_ADD(birthday, 
                INTERVAL YEAR(CURDATE())-YEAR(birthday)
                         + IF(DAYOFYEAR(CURDATE()) > DAYOFYEAR(birthday),1,0)
                YEAR) 
            BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 7 DAY)
     AND (MONTH(birthday) <> MONTH(CURDATE()) OR DAY(birthday) <> DAY(CURDATE()));

Voici une DEMO de toutes les requêtes