SQL SELECT....WHERE Date BETWEEN Dates? : sql, between, date, select

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12.31.2003 at 08:16AM PST, ID: 20838058

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7.8

SQL SELECT....WHERE Date BETWEEN Dates?

Zone: MS SQL Server

Tags: sql, between, date, select

I have a somewhat complex select, which is supposed to return appointments that need notified bewteen today and the appointment date. Sounds simple, but, the appointments have a notification date...which depends on how many days in advance the client wants notified. On top of that, holidays and weekends add to the days in advance.

Everything seemed to be working fine this month, Christmas gave no problems, now we are around a new year and I'm having problems.....

Appointment set for 1/2/2004 where the client wants notified 1 day in advance, which happens to be 1/1/2004 which is a holiday...so the date moves to 12/31/2003 which is today.

My WHERE

.......
AND
(CONVERT(varchar(25), GETDATE(), 101)
BETWEEN
CONVERT(varchar(25), dbo.fn_Confirm_Date(dbo.v_Appointments_Active.Appointment_Log_id,
dbo.Client_Confirmation_Configuration.confirm_days_in_advance), 101)
AND
CONVERT(varchar(25), dbo.v_Appointments_Active.Appointment_Date_Time, 101))

Which I see as being:

Is 12/31/2003 Between 12/31/2003 and 1/2/2004

Anyone have any ideas why the new year seems to give me a problem?

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Question Stats

Zone: Microsoft

Question Asked By: chergenroeder

Solution Provided By: acampoma

Participating Experts: 3

Solution Grade: A

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12.31.2003 at 08:23AM PST, ID: 10022006

Rank: Master

acampoma:

Because you are converting you dates to varchar.you must keep them as dates in your where clause, otherwise, they have no real value other than a string

12.31.2003 at 08:23AM PST, ID: 10022009

Rank: Sage

ShogunWade:

The description would seem to suggest that the answer is infact correct.

You want 1 day (not counting public holidays) notice of an appointment for the 2 jan 2003. that means you haveto give notice today doesnt it?

12.31.2003 at 08:30AM PST, ID: 10022053

Rank: Master

acampoma:

Try this to prove my theory:

select 'Good' where CONVERT(varchar(25), DateAdd(day,1, GetDate()), 101) between
CONVERT(varchar(25), GETDATE(), 101) and
CONVERT(varchar(25), DateAdd(day,2, GetDate()), 101)

select 'Good' where DateAdd(day,1, GetDate()) between
GETDATE() and
DateAdd(day,2, GetDate())

12.31.2003 at 08:35AM PST, ID: 10022072

Rank: Sage

ShogunWade:

Hmm..

Not sure what "theory" you are trying to prove here.....

That now is between now and 2 days later

or

that now is not between this time tomorrow and this time in two days.

...confused....

12.31.2003 at 08:36AM PST, ID: 10022074

Rank: Sage

ShogunWade:

ignore last.

12.31.2003 at 08:38AM PST, ID: 10022090

chergenroeder:

ok acampoma I see what you mean..

but with in my code, how would I compare just the mm/dd/yyyy where the time has no meaning, I don't want to miss a notification at 4pm because the appointment is at 5pm that is the reason I was converting to that format

12.31.2003 at 08:41AM PST, ID: 10022109

Rank: Sage

ShogunWade:

Ah i c what you are getting at now acam. I think New years SQL dyslexia was setting into me then.

That is a good point and I agree that without a doubt this will mess up the results. but im also confused as to how the answer as described is wrong in the first place.

12.31.2003 at 08:46AM PST, ID: 10022133

chergenroeder:

I don't think my answer was wrong in the first place, other than the fact it is comparing strings instead of dates

so I need to figure out how to keep the dates I have, and not worry about the time part

12/31/2003 9:00am BETWEEN 12/31/2003 10:00am AND 1/2/2004 10:00am

See what I mean? If I ran my app at 9am, the 10am appointment would not be seen

12.31.2003 at 08:50AM PST, ID: 10022163

Rank: Sage

ShogunWade:

If you dont want time to be a part of it then compare

floor(convert(float,getdate()))
between
floor(convert(float,dbo.fn_Confirm_Date(dbo.v_Appointments_Active.Appointment_Log_id,
dbo.Client_Confirmation_Configuration.confirm_days_in_advance)))
and
floor(convert(float,dbo.v_Appointments_Active.Appointment_Date_Time))

12.31.2003 at 08:50AM PST, ID: 10022170

Rank: Master

acampoma:

you can convert to varchar, strip off the time, and convert back to datetime

select convert(DateTime,convert(varchar(11),getdate()))

Accepted Solution

12.31.2003 at 08:53AM PST, ID: 10022181

Rank: Sage

ShogunWade:

explanation:

datetime fields are comprised of two integers which can be treat as a float where the number before the . is the date and the number after the . is the time.

so by making it an integer you can compare effectively day numbers.

Or you could of course convert the varchars back to dates again but its messy

12.31.2003 at 08:59AM PST, ID: 10022211

Rank: Sage

ShogunWade:

or....

convert them to CONVERT(varchar(8),eachdate,112)

which would return YYYYMMDD thus you can do between on the strings :)

Assisted Solution

12.31.2003 at 09:02AM PST, ID: 10022242

chergenroeder:

Thanks guys

I can now have a happy new year!

increased the points to 100 and split them for ya guys

12.31.2003 at 09:05AM PST, ID: 10022267

Rank: Sage

ShogunWade:

"I can now have a happy new year!"

yep. have a good one.

12.31.2003 at 09:12AM PST, ID: 10022300

Rank: Master

acampoma:

yes,
Have a happy new year as well ShogunWade and chergenroeder

06.07.2005 at 09:46AM PDT, ID: 14163744

aashishshrestha:

I have Microsoft SQL server 8.0, its located in a high end server, but when i use enterprise manager or query analyzer it workrs really really slow. is there something wrong with it or is there something that can be done to optimize its performance

06.07.2005 at 10:18AM PDT, ID: 14164028

Rank: Sage

ShogunWade:

Sorry aashi,

Much as I would like to help you (as would all the other Experts here on EE), it is in contravention of EE rules & guidelines to ask a question on the back of someone elses question. If you would like to start your own question then I (and everyone else)can assist

20080236-EE-VQP-29