Find records produced in the last hour

Question

I have a smalldatetime field named myTime recording when the record was created. I need the syntax that selects records created within the last hour.

Answer 1

If you want whole hours use the following...

--This Hour
SELECT  *
FROM    Whatever
WHERE   myTime >= dateadd(hour, datediff(hour, 0, GETDATE()), 0)

--Last Hour
SELECT  *
FROM    Whatever
WHERE   myTime  < dateadd(hour, datediff(hour, 0, GETDATE()), 0) AND  myTime >= dateadd(hour, datediff(hour, 0,  DATEADD(HOUR, -1, GETDATE())), 0)

--Hour before last
SELECT  *
FROM    Whatever
WHERE   myTime < dateadd(hour, datediff(hour, 0,  DATEADD(HOUR, -1, GETDATE())), 0) AND  myTime >= dateadd(hour, datediff(hour, 0, DATEADD(HOUR, -2, GETDATE())), 0)

Answer 2

Use this:

SELECT * FROM YourTable WHERE YourDateTime >= DATEADD(hh, -1, GETDATE())

Answer 3

Although this WHERE myTime > DATEADD(HOUR, -1, GETDATE()) should have worked for me, for some strange reason the datetime feild in my sql server is configured in a strange way where the above code would return the entire day, not just the hour prior to Now. After some troubleshooting I found that GETDATE() was actually 7 hours ahead of the current time so my query looks like this:

WHERE myTime BETWEEN DATEADD(HH, 6, GETDATE()) AND DATEADD(HH, 7, GETDATE())

So DATEADD(HH, 7, GETDATE() is now plus 7 hours (which comes out being the current time according to the db). And then subtract an hour to get all rows within that hour block. I thought I should post this just to help anyone having the same issue.

Answer 4

Use this:

SELECT  *
FROM    Whatever
WHERE   myTime > DATEADD(HOUR, -1, GETDATE())