This lecture was really good this time too! It's fun because I'm using the h2 database myself ㅎㅎ I didn't know much about transactions, but you explained it so easily that I understood it right away!! I even dream about it,,,,,,, ㅋ ㅋ ㅋ ㅋ I also understood the exception handling part well because I took Younghan's lecture before ㅎㅎ I want to learn data access techniques soon ㅎㅎ Thank you always!! Please keep teaching for a long time