X 市建了一个新的体育馆,每日人流量信息被记录在这三列信息中:序号 (id)、日期 (date)、 人流量 (people)。
请编写一个查询语句,找出高峰期时段,要求连续三天及以上,并且每天人流量均不少于100。
例如,表 stadium
:
+------+------------+-----------+| id | date | people |+------+------------+-----------+| 1 | 2017-01-01 | 10 || 2 | 2017-01-02 | 109 || 3 | 2017-01-03 | 150 || 4 | 2017-01-04 | 99 || 5 | 2017-01-05 | 145 || 6 | 2017-01-06 | 1455 || 7 | 2017-01-07 | 199 || 8 | 2017-01-08 | 188 |+------+------------+-----------+
对于上面的示例数据,输出为:
+------+------------+-----------+| id | date | people |+------+------------+-----------+| 5 | 2017-01-05 | 145 || 6 | 2017-01-06 | 1455 || 7 | 2017-01-07 | 199 || 8 | 2017-01-08 | 188 |+------+------------+-----------+
Note:
每天只有一行记录,日期随着 id 的增加而增加。# Write your MySQL query statement belowselect * from ( select a.* from stadium a join stadium b on b.id = a.id + 1 join stadium c on c.id = a.id + 2 where a.people >= 100 and b.people >= 100 and c.people >= 100 union select b.* from stadium a join stadium b on b.id = a.id + 1 join stadium c on c.id = a.id + 2 where a.people >= 100 and b.people >= 100 and c.people >= 100 union select c.* from stadium a join stadium b on b.id = a.id + 1 join stadium c on c.id = a.id + 2 where a.people >= 100 and b.people >= 100 and c.people >= 100)a order by id;