CREATE TABLE table_name_29 (giro_wins INTEGER, young_rider VARCHAR(255), jerseys VARCHAR(255), country VARCHAR(255))
what is the giro wins when jerseys is 2, country is portugal and young rider is more than 0?
    
SQL: SELECT SUM(giro_wins) FROM table_name_29 WHERE jerseys = 2 AND country = "portugal" AND young_rider > 0