SQL DATEDIFF Function
Returns the number of date and time boundaries crossed between two datesSQL DATEDIFF Syntax
DATEDIFF ( DatePart , StartDate , EndDate )
DECLARE @StartDate DATETIME
DECLARE @EndDate DATETIME
SET @StartDate ='2007-06-05'
SET @EndDate ='2007-08-05'
SELECT DATEDIFF(Year, @StartDate, @EndDate) AS NewDate
Return Value = 0 Year
SELECT DATEDIFF(quarter, @StartDate, @EndDate) AS NewDate
Return Value = 1 quarter
SELECT DATEDIFF(Month, @StartDate, @EndDate) AS NewDate
Return Value = 2 Month
SELECT DATEDIFF(dayofyear,@StartDate, @EndDate) AS NewDate
Return Value = 61 day
SELECT DATEDIFF(Day, @StartDate, @EndDate) AS NewDate
Return Value = 61 Day
SELECT DATEDIFF(Week, @StartDate, @EndDate) AS NewDate
Return Value = 9 Week
SELECT DATEDIFF(Hour, @StartDate, @EndDate) AS NewDate
Return Value = 1464 Hour
SELECT DATEDIFF(minute, @StartDate, @EndDate) AS NewDate
Return Value = 87840 minute
SELECT DATEDIFF(second, @StartDate, @EndDate) AS NewDate
Return Value = 5270400 second
DECLARE @StartDate DATETIME
DECLARE @EndDate DATETIME
SET @StartDate ='2007-06-05'
SET @EndDate ='2007-06-06'
SELECT DATEDIFF(millisecond, @StartDate, @EndDate) AS NewDate
Return Value = 86400000 millisecon
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