##테이블 create문
CREATE TABLE `tb_reply` (
`idx` INT NOT NULL AUTO_INCREMENT,
`board_idx` INT,
`reply_idx` INT,
`contents` TEXT NULL,
PRIMARY KEY (`idx`));
CREATE TABLE `tb_board` (
`idx` INT NOT NULL AUTO_INCREMENT,
`title` VARCHAR(255) NULL,
`contents` TEXT NULL,
`image` VARCHAR(255) NULL,
PRIMARY KEY (`idx`));