就像我做的那样
SELECT [Date]
FROM [FRIIB].[dbo].[ArchiveAnalog]
GROUP BY [Date]
如何指定分组时段?我使用的是MS SQL 2008。
我已经试过了，使用% 10和/ 10。
SELECT MIN([Date]) AS RecT, AVG(Value)
FROM [FRIIB].[dbo].[ArchiveAnalog]
GROUP BY (DATEPART(MINUTE, [Date]) / 10)
ORDER BY RecT
是否有可能使日期输出没有毫秒?
当前回答
MySql:
GROUP BY
DATE(`your_date_field`),
HOUR(`your_date_field`),
FLOOR( MINUTE(`your_date_field`) / 10);
其他回答
如果你想实际显示日期，有一个变量分组，并能够指定大于60分钟的时间框架:
DECLARE @minutes int
SET @minutes = 90
SELECT
DATEADD(MINUTE, DATEDIFF(MINUTE, 0, [Date]) / @minutes * @minutes, 0) as [Date],
AVG([Value]) as [Value]
FROM [FRIIB].[dbo].[ArchiveAnalog]
GROUP BY
DATEDIFF(MINUTE, 0, [Date]) / @minutes
终于讲完了
GROUP BY
DATEPART(YEAR, DT.[Date]),
DATEPART(MONTH, DT.[Date]),
DATEPART(DAY, DT.[Date]),
DATEPART(HOUR, DT.[Date]),
(DATEPART(MINUTE, DT.[Date]) / 10)
应该是这样的
select timeslot, count(*)
from
(
select datepart('hh', date) timeslot
FROM [FRIIB].[dbo].[ArchiveAnalog]
)
group by timeslot
(不是100%确定语法-我更喜欢Oracle的那种人)
在Oracle中:
SELECT timeslot, COUNT(*)
FROM
(
SELECT to_char(l_time, 'YYYY-MM-DD hh24') timeslot
FROM
(
SELECT l_time FROM mytab
)
) GROUP BY timeslot
间隔10分钟，你会
GROUP BY (DATEPART(MINUTE, [Date]) / 10)
正如tzup和Pieter888已经提到的……做一个小时的间隔
GROUP BY DATEPART(HOUR, [Date])
declare @interval tinyint
set @interval = 30
select dateadd(minute,(datediff(minute,0,[DateInsert])/@interval)*@interval,0), sum(Value_Transaction)
from Transactions
group by dateadd(minute,(datediff(minute,0,[DateInsert])/@interval)*@interval,0)
