insert into t_user_tag (user_id, tag_id) values (#{item.userId},#{item.tagId}) delete from t_user_tag where user_id = #{id} select tag_id from t_user_tag where user_id = #{id} select name from t_tag where deleted = 0 and id in (select tag_id from t_user_tag where user_id = #{id}) select user_name from t_user where id in (select user_id from t_user_tag where tag_id = #{id}) and deleted = 0