Question

I am looking for an optimal decision of how to get table values according to their date and time but within just ONE past hour.

I mean something in this way (a pseudocode):

 SELECT value FROM Table WHERE date BETWEEN getdate() AND getdate()-ONE_HOUR

For the purpose of this question Table has these columns:

• value
• date

Any useful snippet is appreciated 🙂

Answer 1

SELECT Value
FROM Table
WHERE Date between dateadd(hour, -1, getdate()) and getdate()

Description of the DATEADD function:

DATEADD (datepart , number , date )

Returns a specified date with the specified number interval (signed integer) added to a specified datepart of that date.

datepart     Abbreviations  
-----------  -------------
year         yy, yyyy
quarter      qq, q
month        mm, m
dayofyear    dy, y
day          dd, d
week         wk, ww
weekday      dw, w
hour         hh 
minute       mi, n
second       ss, s
millisecond  ms 
microsecond  mcs 
nanosecond   ns 

More information:

• DATEADD (Transact-SQL)