Question

我想逐个小时计数，但不能按小时分组。

select t_date_time_issued,t_street_name,count(t_reference) from tickets 
WHERE t_date_time_issued BETWEEN '03/06/2015' AND '03/07/2015'  and t_street_name like '%airport%'
GROUP BY t_street_name,t_reference,t_date_time_issued
order by t_date_time_issued

当前输出

2015-06-03 09:34:25.000 Airport (60/100 14 Day) 1
2015-06-03 09:38:06.000 Airport (60/100 14 Day) 1
2015-06-03 10:09:06.000 Airport (60/100 14 Day) 1
2015-06-03 10:14:16.000 Airport (60/100 14 Day) 1
2015-06-03 10:28:25.000 Airport (60/100 14 Day) 1

相反，我想得到：

2015-06-03 09:00:00.000 Airport (60/100 14 Day) 2
2015-06-03 10:00:00.000 Airport (60/100 14 Day) 3

Answer 1

将GROUP BY分成一个日期（使用CAST AS DATE）和一小时（使用DATEPART）。

SELECT CAST(t_date_time_issued AS DATE), DATEPART(hour, t_date_time_issued), t_street_name, count(t_reference) 
FROM tickets 
WHERE t_date_time_issued BETWEEN '03/06/2015' AND '03/07/2015' 
AND t_street_name LIKE'%airport%'
GROUP BY t_street_name, t_reference, CAST(t_date_time_issued AS DATE), DATEPART(hour, t_date_time_issued)
ORDER BY t_date_time_issued

Answer 2

您正在获得该结果，因为您也按日期分组，并且每行都有不同的日期。您应该只访问日期的小时而不需要分钟。

在sql中按小时分组和计数

2 个答案: