WITH t1 AS ( SELECT * FROM tb_user_log WHERE artical_id != 0 ), t2 AS ( SELECT uid, artical_id, in_time, 1 AS uv FROM t1 UNION ALL SELECT uid, artical_id, out_time, -1 AS uv FROM t1 ), t3 AS ( SELECT artical_id, in_time, uv, sum(uv) OVER (PARTITION BY artical_id ORDER BY in_time ASC,uv DESC ) AS sum...