INSERT INTO `item_user` ( `item_id`, `user_id`, `user_name`) VALUES ( #{item.itemId}, #{item.userId}, #{item.userName} ) delete from item_user where item_id =#{id} SELECT `id`, `company_id`, `item_name`, `del_flag`, `create_by`, `create_time`, `update_by`, `update_time` FROM `item` where del_flag = 1 and company_id = #{companyId} SELECT i.`id`, i.`company_id`, i.`item_name`, i.`del_flag`, i.`create_by`, i.`create_time`, i.`update_by`, i.`update_time` FROM `item` i LEFT JOIN item_user iu ON i.id = iu.item_id WHERE i.del_flag = 1 and i.company_id = #{companyId} and iu.user_id = #{userId} GROUP BY i.id SELECT iu.`id`, iu.`item_id`, iu.`user_id`, su.`name` as user_name, iu.`del_flag` FROM `item_user` iu left join sys_user su on iu.user_id = su.id where item_id = #{itemId}