大多數號碼的連續登錄天

Question

比方說，我有這個表：

date  | has_login 
------------------------ 
2015-01-01 | 1 
2015-01-02 | 1 
2015-01-03 | 0 
2015-01-04 | 1 
2015-01-05 | 1 
2015-01-06 | 1 
2015-01-07 | 0 
2015-01-08 | 1 

我如何獲得最大數量的連續登錄的？ 在這種情況下，它應該是

Answer 1

嘗試

select max(cons) as max_consecutives 
from 
(
    select @cons := case when has_login = 1 
         then @cons + 1 
         else 1 
        end as cons 
    from your_table 
    cross join (select @cons := 0) c 
    order by date 
) tmp