JunitTest ๐จ ํ ์ด๋ธ ํ ์คํธ ์๋ฒ์์ ๋๋ ค๋ณด๊ณ ์ด์ํ๊ฒฝ์ผ๋ก ๋๋ฆฌ๊ธฐ '''sql create table Book ( id bigint generated by default as identity, author varchar(20) not null, title varchar(50) not null, primary key (id) ) '''