Question

How to find difference between two dates?

Asked by: Westside2004

Hi,

I wanted to find out how I can find the difference between two dates... not just the result using DateDiff, but I need to run a query and in my where clause I have:

WHERE thedate between '2005-03-01' and '2005-03-03'

This gives me the dates between those numbers, not starting on 3/1/05 through 3/3/05

can someone assist, I need to take the start date and subtract it by 1....

So if the start date is 3/1/05 and I am using "BETWEEN", then I want it really to be startDate - 1 so I get 2/28/05 - my end date

Any help appreciated

-ws

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Asked On
2005-03-03 at 19:58:03ID21337355
Tags

between

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dates

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difference

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two

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find

Topic

ColdFusion Application Server

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Answers

 

by: INSDivision6Posted on 2005-03-03 at 20:18:21ID: 13456084

>This gives me the dates between those numbers, not starting on 3/1/05 through 3/3/05

What do you mean?  What database you are using?

 

by: Westside2004Posted on 2005-03-03 at 20:39:18ID: 13456131

sql server 2000

I mean the following where clause:

WHERE thedate between '2005-03-01' and '2005-03-03'

gives me days in BETWEEN those two dates specified.

I want to find the between those days and the days themselvs

From 3/1-3/3 is 3 days.  A perso could work on the 1st, 2nd, 3rd.

So most people verbally say it like the 1st through the 3rd, and they mean the 1st, 2nd, and 3rd

If you use BETWEEN as I did in my example where clause, you will see the only date between the 1st and the 3rd is the 2nd and that is not what is needed here..

Hope that helps

-ws

 

by: SidFishesPosted on 2005-03-03 at 20:53:00ID: 13456174

this should work

WHERE thedate >= '2005-03-01' and thedate <='2005-03-03'

 

by: SidFishesPosted on 2005-03-03 at 20:54:50ID: 13456183

and if you are using cf (outside of sql)

<cfif thedate gte "2005-03-01" and thedate lte "2005-03-03">

 

by: parekh_minalPosted on 2005-03-03 at 21:00:58ID: 13456209

Hi,

If you are also storing the time along with the dates,
write it as WHERE thedate >= '2005-03-01 00:00:00' and thedate <='2005-03-03 11:59:59'

coz default it takes time as 00:00:00 (if not mentioned.

 

by: Westside2004Posted on 2005-03-03 at 21:33:22ID: 13456314

Hi,

Yes, I am using CF

however, it seems the time should be calculated as well.

so from 2005-03-01 (00:00:00:) and 2005-03-03 (23:59:59)

something like that.....


?

 

by: entrance2002Posted on 2005-03-03 at 21:44:15ID: 13456351

Hi Westside2004!

If the data type of your column "thedate" is datetime, then you really need to use "CONVERT".

So, you can have your condition like this :

   WHERE convert(datetime,thedate,101) between '03/01/2005' and '03/03/2005'

:: Take note ::
   The date format is in "mm/dd/yyyy".  You can select any formatting basing from this link http://msdn.microsoft.com/library/default.asp?url=/library/en-us/tsqlref/ts_ca-co_2f3o.asp

Hope this helps you.  Just try it.

Actually, you can also do what parekh_minal suggested.  But I have a minor correction.

Instead of :  thedate <='2005-03-03 11:59:59'
Use :  thedate <='2005-03-03 23:59:59'

Am i right parekh_minal ???  Just correct me if I'm wrong #-o


Regards!
eNTRANCE2002 :-)

 

by: INSDivision6Posted on 2005-03-03 at 21:50:25ID: 13456371

BETWEEN assumes "inclusive".  However, if there is a time issue the best way to use:

. . .  WHERE DATEDIFF(d, '#start_date#', thedate)>=0 AND DATEDIFF(d, thedate, '#end_date#')>=0

 

by: parekh_minalPosted on 2005-03-03 at 23:41:20ID: 13456708

Hi entrance,

u r correct,

I put the time as '11:59:59' althought i meant '23:59:59' (just forgot that it's a 24 hour format)

Westside2004, the correct syntax would be :
WHERE thedate >= '2005-03-01 00:00:00' and thedate <='2005-03-03 23:59:59'

 

by: entrance2002Posted on 2005-03-03 at 23:44:22ID: 13456716

Hello Westside2004!

How is it going right now ???  Do you still have any problem ?

Let us know.


Regards!
eNTRANCE2002 :-)

 

by: LuckyBloodPosted on 2005-03-04 at 02:21:14ID: 13457390

Hello Westside2004,

I think the easiest way to include the days is this:

WHERE thedate between '2005-03-01 00:00:00' and '2005-03-03 23:59:59'  

So you get all entries between this two days and all entries of the starting and the end date

 

by: Jester_48Posted on 2005-03-04 at 05:48:23ID: 13458731

WHERE thedate between '2005-03-01' and '2005-03-03'

gives me days in BETWEEN those two dates specified.

I want to find the between those days and the days themselvs

as previously stated by INSDivision6  bewteen in inclusive

but you can try


WHERE dateFormat(thedate,'mm/dd/yyyy')  between dateFormat('2005-03-01','mm/dd/yyyy') and dateFormat('2005-03-03','mm/dd/yyyy')

 

by: mrichmonPosted on 2005-03-04 at 11:45:53ID: 13461910

If you are looking for the actual dates then do something like a loopfor x = 0 to DateDiff(date1, date2) and inside the loop do
DateAdd(d, x, date1)

You will have each date sequentially.

If you do not want to include the first or second date then subtract 1 from the result of the datedif and start x at 1 instead of 0

20120131-EE-VQP-002

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