MySQL-如何獲得連續預定天數的用戶？

Question

假設我有一個包含以下各列的表（tbl_reservations）：

p_id
userid
reservation_id
book_date
db_add_date

p_id    userid  reservation_id  book_date       
1       01      124534          2016-02-19      2016-02-19
2       01      124554          2016-02-20      2016-02-20
3       01      124564          2016-02-21      2016-02-21
4       01      167823          2016-02-22      2016-02-22
5       01      12313           2016-02-23      2016-02-23
6       02      134564          2016-02-21      2016-02-21
7       03      197823          2016-02-22      2016-02-22
8       02      13313           2016-02-23      2016-02-23

**Desired Result**

As userid 01 booked reservation since last 5 days regularty it will appear in query result

userid
01

我想獲得連續預定天數的用戶嗎？

例如，我想吸引過去5天預訂的唯一身份用戶

誰能幫助我如何建立對此的查詢？ 這將是一個很大的幫助。 謝謝。

Answer 1

如果您希望最近五天預訂過的唯一身份用戶，那么類似的查詢似乎可以滿足您的要求：

select userid
from tbl_reservations
where bookdate > date_sub(curdate(), interval 5 day) and bookdate <= curdate()
group by userid;

如果您希望全天預訂的用戶：

select userid
from tbl_reservations
where bookdate > date_sub(curdate(), interval 5 day) and bookdate <= curdate()
group by userid
having count(*) = 5;

Answer 2

試試這個查詢：

SELECT userid
from tbl_reservations
WHERE book_date >= DATE_SUB(CURDATE(), INTERVAL 5 DAY) AND book_date <= CURDATE() 
GROUP BY userid
HAVING COUNT(*) = 5;

Answer 3

試試這個sql。您將獲得從當前日期起預訂列表的最近％天

select count(userid), userid
from tbl_reservations
where (book_date > DATE_ADD(CURDATE(), INTERVAL -5 DAY) and      book_date<=CURDATE())
group by userid
having count(*) = 5;