jpa 데이터 insert 및 read 해보기

mysql 간단한 blog 테이블 만들기-- mydb.tb_blog definitionCREATE TABLE mydb.tb_blog (blog_id BIGINT auto_increment NOT NULL,blog_title varchar(100) NOT NULL,blog_content varchar(100) NOT NULL,reg_dt DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL,upd_dt DATETIME DEFAULT CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP NOT NULL,PRIMARY KEY (`blog_id`))ENGINE=InnoDBDEFAULT CHARSET=utf8mb4COLLATE=utf8mb4_0900.....