I am trying to extract data from a large SQL DB on hourly basis. The following query is giving me a grouping on minute basis. I wish to group by the data on hourly basis.
select CONVERT(VARCHAR(20), t.counterTime, 100) as [Time],
t.instanceName
from table as t
WHERE t.counterId= @counterId
and t.counterTime >= @startTime
and t.counterTime < @endTime
group by t.instanceName, CONVERT(VARCHAR(20), t.counterTime, 100)
The documentation also does not provide any such option. Any ideas?
Try like this,
--SQL Server 2012
SELECT FORMAT(t.counterTime, 'yyyy-MM-dd HH') AS [Time]
,t.instanceName
FROM TABLE AS t
WHERE t.counterId = @counterId
AND t.counterTime >= @startTime
AND t.counterTime < @endTime
GROUP BY t.instanceName
,FORMAT(t.counterTime, 'yyyy-MM-dd HH')
--for earlier versions
SELECT CONVERT(CHAR(13), t.counterTime, 120) AS [Time]
,t.instanceName
FROM TABLE AS t
WHERE t.counterId = @counterId
AND t.counterTime >= @startTime
AND t.counterTime < @endTime
GROUP BY t.instanceName
,CONVERT(CHAR(13), t.counterTime, 120)
Note: Format would be perfoming slower.
您可以使用以下子字符串:
select substring(field,1,4) + '-'+ substring(field,6,2) +'-'+ substring(field,7,2)+' '+ substring(field,9,2) from dbo.youtable
Try this
select datepart(hour,t.counterTime) as [Time],
t.instanceName
from table as t
WHERE t.counterId= @counterId
and t.counterTime >= @startTime
and t.counterTime < @endTime
group by t.instanceName, datepart(hour,t.counterTime)
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