Comments on: SQL SERVER – DATEDIFF – Accuracy of Various Dateparts

By: techlearn

techlearn — Mon, 15 Apr 2013 14:51:46 +0000

can you do something like this?
select datediff(minute, select date from xyz where A=4232, getdate()) as minutediff
I want to use date from database with where clause. is it possible?

By: Dogsh

Dogsh — Mon, 01 Apr 2013 18:10:59 +0000

thanks for valuable explain. This is great !,
İt is not a bug, but I agree with you that is is not useful.

By: sraja

sraja — Mon, 18 Feb 2013 09:21:11 +0000

hi i have also a problem with diffdate without week end, if you can help me:
i try to find days between two dates and it’s give the right result wehn the dates are in same year, but when the date change the year it’s go to wrong,
my code is:
convert (float,datediff(dd,departureDate, min(arrivalDate)) – (isnull((datepart(wk, min(arrivalDate)) – datepart(week,Event2024_actual))*2,0))) as arrivalhome

the result is

By: Veeresh

Veeresh — Sun, 27 Jan 2013 10:24:43 +0000

Output will be like 2:30

By: Veeresh

Veeresh — Sun, 27 Jan 2013 10:24:08 +0000

How to convert hours into Minuates like if time is 2:30 like this

By: poonam

poonam — Thu, 20 Dec 2012 08:36:48 +0000

I THINK IT IS A BUG

By: Suresh

Suresh — Tue, 06 Nov 2012 20:45:32 +0000

Looks like it wrong results. Try to find out below sql statement exact difference in years, months and days. Below statement output results is 1 Year, 1 Month and 5 days. But I expected 0 years, 0 months and 5 days. Date scenario is 5th Jan 2013 to 31st Dec 2012

SELECT
DATEDIFF(Year,’2012-12-31′,’2013-01-05′) AS YearDiff,
DATEDIFF(Month,’2012-12-31′,’2013-01-05′) AS MonthDiff,
DATEDIFF(Day,’2012-12-31′,’2013-01-05′) AS DayDiff

By: Sham Sunder

Sham Sunder — Fri, 19 Oct 2012 09:18:06 +0000

I think there is a confusion, if you say that the expression only looks the minute part of two dates to get the difference.

Then how the below statement gives me 721 minutes. I have changed also given AM PM suffix. If it only check minute part then it should still give us result as 1 minute.

SELECT DATEDIFF(MINUTE,’2011-10-14 02:18:58 AM’ , ’2011-10-14 02:19:01 PM’) AS MIN_DIFF

By: joy

joy — Thu, 11 Oct 2012 00:01:13 +0000

Hi…

I must be missing something… can someone shed some light on this please…

DateDiff(minute, 2012-10-10 08:00:00.000, 2012-10-10 10:30:00.000)

this returns 150.

Should’nt the answer be 30… if all i am looking is the difference in minutes of the minute part.

Thanks
Joy

By: Waqar-DBA

Waqar-DBA — Wed, 03 Oct 2012 13:58:44 +0000

Hi Pinal,
i have one problem in database can you solve it ? the problem is this. if a product have today price 5 rupees and after 10 days increses 5 rupees mean in 15. how we can update or refresh the price of the product in the table which is uploaded before?

By: Lijin

Lijin — Wed, 03 Oct 2012 12:21:39 +0000

Hi,
I have two dates say fromdate = ’13/09/2012 5:57′ and todate= ’13/09/2012 11:00′. My requirement is to get the difference like ’0 Day 5 Hour 3 Minutes’. Can u please write a query for finding the difference like this.

Thanks,
Lijin Joy

By: varun

varun — Wed, 18 Jul 2012 16:53:00 +0000

hi, pls give me the query to write for this logic, if the records exists on yesterday file but not in current files then i need to insert those records into the respective table, pls give the solution with this

By: anand

anand — Tue, 12 Jun 2012 13:09:37 +0000

Hi pinal
I need a query which display date difference in hh:mm:ss in sql.If 2 days difference then it should convert days into hours

By: Dewesh Pushkar

Dewesh Pushkar — Thu, 31 May 2012 04:02:14 +0000

It was really very nice tutorial………………Thanks

By: madhivanan

madhivanan — Wed, 23 May 2012 11:31:44 +0000

Difference in what aspect days, minutes, seconds,etc?

By: mansom

mansom — Tue, 08 May 2012 09:10:32 +0000

i want minutes difference between 2012-01-02 12:55:55.568 and 2012-01-03 10:12:56.698

By: sathish.s

sathish.s — Tue, 10 Apr 2012 06:54:55 +0000

want to get hh:mm format

By: Eugen

Eugen — Wed, 09 Nov 2011 11:50:02 +0000

Though this approach won’t work if you need to find difference in months or years due to different quantity of days in different months and years. I’ve been waiting for some function which would work as it is expected since MS SQL 2000 but it hadn’t appeared.
Actually everybody can replace this function by Year(a)-Year(b) and get the result. And everybody should write quite a complex and not very fast query to calculate a REAL difference in years or months.

By: Bruno

Bruno — Fri, 21 Oct 2011 19:18:12 +0000

You have 03:18:00 – 02:18:00, that’s a 60 minute difference.

The result from the query is correct. It only ignores the parts lower than minutes, not hours, days and years.

By: Bruno

Bruno — Fri, 21 Oct 2011 19:17:28 +0000

You have 03:18:00 – 02:18:58, that’s a 60 minute difference.

The result from the query is correct. It only ignores the parts lower than minutes, not hours, days and years.

By: Vinoth Kumar

Vinoth Kumar — Fri, 21 Oct 2011 16:29:38 +0000

I just want to comment on below section

“When you instruct SQL Server to find the time difference in minutes, it just looks at the minute section only and completely ignores hour, second, millisecond, etc. So in terms of difference in minutes, it is indeed 1.”

SQL server will not exclude hours in the above case, it looks for minimum units(in this case everything above minutes will be considered like hours, days, year, etc but things that are less than minutes will not be considered like ‘seconds, milliseconds,etc’)

In the below query there is no change in minutes but i have changed hours

SELECT DATEDIFF(MI,’2011-10-14 02:18:58′ , ’2011-10-14 03:18:00′) AS MIN_DIFF

Result i got is 60

For the below query the result will be “0″ as we don’t have a minimum difference of 1 second

SELECT DATEDIFF(MI,’2011-10-14 02:18:58′ , ’2011-10-14 02:18:59′) AS MIN_DIFF

By: Varinder Sandhu

Varinder Sandhu — Fri, 21 Oct 2011 06:12:47 +0000

Really Nice Explanation ….

Thanks for sharing.

By: Shyam

Shyam — Fri, 21 Oct 2011 05:31:44 +0000

Interesting and good one.

By: Pankaj Nikam

Pankaj Nikam — Fri, 21 Oct 2011 03:05:30 +0000

Awesome read! It was a really good… Never knew this thing about datediff.
Thanks for such informative post.

By: Jason

Jason — Fri, 21 Oct 2011 01:44:46 +0000

These types of posts make me miss Oracle’s TO_DATE and TO_CHAR functions. I was just working through this the other day with hours, I wanted to check the last backup of a database, and find all that had been longer than one hour… but I wanted something like 1:05AM and 2:00AM to be included in the hour interval. It took me a few minutes longer than it should have to code it up.