SQL Server DateDiff - Date Format

The DATEDIFF function is use to get the differences in days, hours, minutes, seconds etc. and It is returns the time between two dates.

The DATEDIFF function can be used from above version of SQL Server 2005.

--Syntax
DATEDIFF(DATE_PART, START_DATE, END_DATE)

--Types of,
SELECT DATEDIFF(DAY, GETDATE(), GETDATE() + 1) AS DAY_DIFFERENCE 
SELECT DATEDIFF(WEEK, GETDATE(), GETDATE() + 1) AS WEEK_DIFFERENCE
SELECT DATEDIFF(HOUR, GETDATE(), GETDATE() + 1) AS HOUR_DIFFERENCE
SELECT DATEDIFF(MINUTE, GETDATE(), GETDATE() + 1) AS MINUTE_DIFFERENCE
SELECT DATEDIFF(SECOND, GETDATE(), GETDATE() + 1) AS SECOND_DIFFERENCE

-- Example as,
SELECT DATEDIFF(YEAR, '2015/04/28', '2016/04/28');
--RESULT is: 1

SELECT DATEDIFF(YYYY, '2015/04/28', '2016/04/28');
--RESULT is: 1

SELECT DATEDIFF(YY, '2015/04/28', '2016/04/28');
--RESULT is: 1

SELECT DATEDIFF(MONTH, '2015/01/01', '2016/04/28');
--RESULT is: 15

SELECT DATEDIFF(DAY, '2015/01/01', '2016/04/28');
--RESULT is: 483

SELECT DATEDIFF(HOUR, '2015/04/28 07:00', '2016/04/28 11:45');
--RESULT is: 8788

SELECT DATEDIFF(MINUTE, '2015/04/28 07:00', '2016/04/28 11:45');
--RESULT is: 527325

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