insert into flarum_discussion_user (`user_id`,`discussion_id`,`last_read_at`,`last_read_post_number`,`subscription`,`create_by`,`create_time`,`update_by`,`update_time`,`del_flag`,`remark`) values (?user_id,?discussion_id,?last_read_at,?last_read_post_number,?subscription,?create_by,?create_time,?update_by,?update_time,?del_flag,?remark) update flarum_discussion_user set `user_id`=?user_id,`discussion_id`=?discussion_id,`last_read_at`=?last_read_at,`last_read_post_number`=?last_read_post_number,`subscription`=?subscription,`create_by`=?create_by,`create_time`=?create_time,`update_by`=?update_by,`update_time`=?update_time,`del_flag`=?del_flag,`remark`=?remark where id =?id delete from flarum_discussion_user where id =?id select `user_id`,`discussion_id`,`last_read_at`,`last_read_post_number`,`subscription`,`create_by`,`create_time`,`update_by`,`update_time`,`del_flag`,`remark` from flarum_discussion_user where id =?id select `user_id`,`discussion_id`,`last_read_at`,`last_read_post_number`,`subscription`,`create_by`,`create_time`,`update_by`,`update_time`,`del_flag`,`remark` from flarum_discussion_user