DATEDIFF (Azure Stream Analytics)

Returns the count (signed integer) of the specified datepart boundaries crossed between the specified startdate and enddate.

Syntax

DATEDIFF ( datepart , startdate, enddate )  

Arguments

datepart

Is the part of startdate and enddate that specifies the type boundary crossed. The following table lists all valid datepart arguments.

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

startdate

Is an expression that can be resolved to a datetime. date can be an expression, column expression, or string literal. Startdate is substructed from enddate

enddate

Is an expression that can be resolved to a datetime. date can be an expression, column expression, or string literal. Startdate is substructed from enddate

Return Types

bigint

Examples

SELECT DATEDIFF (minute, EntryTime, CAST(’2014-09-10 12:00:00’ AS datetime)) AS DiffTime  
FROM Input TIMESTAMP BY EntryTime  
WHERE Toll > 5  
  
SELECT DATEDIFF (minute, EntryTime, DATEADD(hour,2,EntryTime)) AS DiffTime  
FROM Input TIMESTAMP BY EntryTime  
WHERE Toll > 5  
  

Note

In Stream Analytics Query Language there is a special use of DATEDIFF function when used inside a JOIN condition. See JOIN (Azure Stream Analytics).