MATERI UNION : https://www.w3schools.com/mysql/mysql_union.asp GROUP BY : https://www.w3schools.com/mysql/mysql_groupby.asp HAVING : https://www.w3schools.com/mysql/mysql_having.asp QUIZ: https://docs.google.com/forms/d/e/1FAIpQLSf-_Vmu_cFNngwKLvsS-BTus6Biva1xdF01_mcNM460tuPpUw/viewform