从具有多个值的单列计数

Question

我有一个如下表格值，

id tank_id filledTime
1   TIND10 6PM,7PM,9PM,9PM,7PM,11PM,7PM,9PM,7PM,7PM,8PM,7PM,10PM,8PM,7PM,8PM,8PM,6PM,8PM,9PM,8PM,11PM,8PM

期待输出：

tank_id NoOfTimeFilledInSpecTime
TIND10  2(6PM),7(7PM),4(9PM),2(11PM),7(8PM),1(10PM)

注意：filledTime是单列

如何使用mysql查询实现此目的？

Answer 1

这选择了什么吗？

select tank_id, count(filledTime), filledTime
from yourtable
where filledTimein (select filledTimefrom yourtable)
and tank_id = 'TIND10'
group by tank_id,filledTime;

应输出：

tank_id |计数| filledtime TIND10 | 2 |下午6时

依旧......

Answer 2

假设您的数据库是tankDetails并且表是tank。然后你可以得到一个类似的查询：

use tankDetails;
select tank_id,filledTime, count(filledTime) as NoofTime
from  tank
group by tank_id,filledTime;

希望这有帮助！