JPA 책을 읽다가 기록하고 내 것으로 만들고 싶은 부분 기록 ✅ DB Table 구성 CREATE TABLE MEMBER ( MEMBER_ID VARCHAR(255) NOT NULL , TEAM_ID VARCHAR(255) , USERNAME VARCHAR(255) , PRIMARY KEY (MEMBER_ID) ) ; CREATE TABLE TEAM ( TEAM_ID VARCHAR(255) NOT NULL , NAME VARCHAR(255) , PRIMARY KEY (TEAM_ID) ) ; ALTER TABLE MEMBER ADD CONSTRAINT FK_MEMBER_TEAM FOREIGN KEY (TEAM_ID) REFERENCES TEAM ; ✅ Class - Member class Member {..