create table tb_notification_target
(
    NOTIFICATION_ID varchar(20)            not null comment '알림 ID',
    USER_ID         varchar(20)            not null comment '사용자 ID',
    READ_YN         varchar(1) default 'N' not null comment '확인 여부(Y/N)',
    READ_DTTM       datetime               null comment '확인 일시',
    REG_DTTM        datetime               null comment '등록 일시',
    RGTR            varchar(20)            null comment '등록자',
    MDFCN_DTTM      datetime               null comment '수정 일시',
    MDFR            varchar(20)            null comment '수정자',
    primary key (NOTIFICATION_ID, USER_ID),
    constraint fk_notification_target_notification
        foreign key (NOTIFICATION_ID) references tb_notification (NOTIFICATION_ID),
    constraint fk_notification_target_user
        foreign key (USER_ID) references tb_user (USER_ID)
)
    comment '알림 대상자';