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Asked: 2026-06-01T16:05:53+00:00

I am using SQL Server and just identify one problem in my case. I

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I am using SQL Server and just identify one problem in my case.
I have used the DATEDIFF function as:

select datediff(dd,'1935-12-07','2010-03-02')/365.00  ---> 74.28
select datediff(dd,'1935-12-07','2010-03-02')/365     ---> 74
select datediff(yy,'1935-12-07','2010-03-02')         ---> 75

If you can observe that If I try DATEDIFF with ‘dd’ then I get the difference as 74/74.28.
But If I use it with ‘yy’ I get the diference as 75.

Why this is so? Means Why the difference came as 75 as it nearly approximate to 74.

I need this both function in different cases. But as it is behaving differently I am facing a lot of problems.

Suggest me some solution to this.

Thanks.

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1 Answer

  1. Editorial Team

    First case = You’re implicitly casting to a float, shows the correct result

    Second case = You’re implictly casting to an int, which rounds down as part of the conversion (Floor value)

    Third case = You’re not casting anything at all, and DATEDIFF() returns a signed int, which rounds up (Ceiling value)

    Solution: Do whatever you want, but keep it consistent throughout your code.

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