SQL - SQL Server DATEDIFF() Function

August 6, 2024

Categories: Reference, SQL Reference, SQL Server Functions

Quick Reference

The SQL Server DATEDIFF() function returns the difference between two dates.

SELECT DATEDIFF(year, '2023/04/15', '1990/12/25') AS Difference;

Output

Difference
-33

Syntax

DATEDIFF(interval, date1, date2)

Parameters

Parameter	Description
interval	The time/date interval to add (required) year, yyyy, yy = Year quarter, qq, q = Quarter month, mm, m = month dayofyear, dy, y = Day of the year day, dd, d = Day week, ww, wk = Week weekday, dw, w = Weekday hour, hh = hour minute, mi, n = Minute second, ss, s = Second millisecond, ms = Millisecond
date1, date2	The two dates to calculate the difference between (required)

SQL Notes:

Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup

If you like our content, and find it helpful, please consider making a small donation. Thank you!

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.