问在两个相关表中插入值MySQL

EN

create table `db_csms`.`tbl_item_requester`
(
    `id` int not null,
    `item_id` int not null,
    `requester_id` int not null,
    foreign key(`item_id`) references `db_csms`.`tbl_items`(`item_id`),
    foreign key(`requester_id`) references `db_csms`.`tbl_user_details`(`user_id`),
    primary key (`id`)
);
create table `db_csms`.`tbl_item_requests`
(
    `id` int not null,
    `item_requester_id` int not null,
    `quantity` int(5) not null default 0,
    foreign key(`item_requester_id`) references `db_csms`.`tbl_item_requester`(`id`),
    primary key (`id`)
);