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Not Returning any data when dates are equal.

  i have a Stored Procedure,which takes two date parameters and returns values.
  Part of my procedure is :
   DECLARE @startdate datetime
DECLARE @enddate datetime

SELECT prmykey,min(seqnum) min_seq
 INTO #min_seqnum from audit
WHERE prmytable = 'secmaster'
 AND    code = 1
 AND    name = 'Security'
 AND entrydate Between @startdate and  @enddate

When i execute the procedure with different @startdate and @enddate,it works fine.
 But when i give the same date to both @startdate and @enddate it is not returning any data.
 Example EXEC my_proc '1/1/2006','1/1/2006' doesnot return any data,even tough there is data for that date.
 did anybody encounter something like this,or know the solution?
 Please let me know.
Sybase Database

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8/22/2022 - Mon

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Oh yeah,
   i completely forgot about the timestamp.Thanks Bret.
   But,if i truncate the timestamp,it'll bring me wrong results for the "different" @startdate and @enddate.
   Can you suggest a way to handle both when they are equal and when they are different?


>>You should otherwise be selecting between "1/1/2006" and "1/1/2006 23:59:59:999"

Bret,i give these dates (@startdate and @enddate) as prompts to the users.So,they are expected to enter simply the
 dates without timestamps.My reporting tool is Business Objects.It automatically takes the dates with the timestamp

Perhaps use dateadd() to add 1 day and then subtract 1ms from @enddate?
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William Peck

What i want to do is to handle 2 cases :
 Case1 : When the Date prompts are Different : keep the timestamps intact.
 Case2 : when the Date Prompts are equal : truncate the timestamp to compare only dates 'without timestamps".
 Can you suggest me an idea to incorporate these two in a single query?

Thanks much for your help!!
Jan Franek

Hi, I usually don't use BETWEEN when dealing with dates, but use < and >= instead. And I usually add one day to @enddate.

So, when my user insert @startdate = '2006/1/1' and @enddate = '2006/1/1' I'll transform it to:

  and entrydate >= @startdate
  and entrydate < dateadd( day, 1, @enddate )

this will show all the records of '2006/1/1' regardless of time.

But this technique is usable only when you don't expect users to input time part of @enddate.

If you want to allow users to input time part, you can use this:

  and entrydate < case when @enddate = convert( datetime, convert( varchar(10), @endate, 102 )) then @endate else dateadd( day, 1, @endate ) end

this will add a day only if there is no time part of @enddate. However, this is little nonconsistent approach and can be confusing for some users.

Thanks guys for your help!!
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