sql小练习,连续次数

数据样例:

小鹏汽车充电有两种类型,快充、慢充,有如下数据:
车辆 ID 充电时间  充电类型 

 

 

其中 1 为快充,0 为慢充,求每辆车最长 连续快充次数 ,以上例子结果为
a 3
b 0 
请写出对应的 SQL

SELECT
    b.id ,
    IFNULL(MAX(times),0) as '最长'
from 
(
SELECT id FROM `xiaopengcar` GROUP BY id
) b
LEFT JOIN
(SELECT 
        id,
        count(id) as times
from
        (SELECT 
        id,
        LEFT(date,10) as dsa,
        type,
        ROW_NUMBER()OVER(ORDER BY LEFT(date,10) ASC ) as num1
        
FROM `xiaopengcar`) a
WHERE type = '1'
GROUP BY id , DATE_ADD(dsa,INTERVAL-num1 day)) c
on b.id = c.id
GROUP BY b.id

 

 

posted @ 2022-02-17 14:38  shan_zhayidian  阅读(86)  评论(0编辑  收藏  举报