Interesting SELECT

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Interesting SELECT

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Martin Zajicek

Posted Monday, October 27, 2008 6:46 AM

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Last Login: Tuesday, December 11, 2012 7:47 AM
Points: 30, Visits: 117

Hello,
I have this situation. I have a table #T1

CREATE TABLE #T1 (
cislo int,
datod smalldatetime,
datdo smalldatetime,
utvar varchar(24)
)

and here are these data

cislo datod datdo utvar
515 2002-04-01 00:00:00 2003-01-31 00:00:00 4004
515 2003-02-01 00:00:00 2006-07-17 00:00:00 7003
515 2006-07-18 00:00:00 2007-12-31 00:00:00 0000
515 2008-01-01 00:00:00 2008-10-27 12:15:00 7003

I have a storedProcedure with Input parameters:
@DatumOd as SmallDateTime
@DatumDo as SmallDateTime

and They have values
@DatumOd='20021201'
@DatumDo='20021231'

I have to select records , which are in this range. For this example, it have to select this record
515 2002-04-01 00:00:00 2003-01-31 00:00:00 4004

I try this:
select * from #T1r
where cislo=515 and
((datod between '20021201' AND '20021231') OR (datdo between '20021201' AND '20021231'))

or

select * from #T1
where cislo=515 and
((datod>='20021201' AND datdo<='20021231')) AND
(datdo '20021231'))

Could you help me with correct select command or some udf function?

Thank you

Post #592053

Out For Justice

Posted Monday, October 27, 2008 7:02 AM

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Group: General Forum Members
Last Login: Friday, August 20, 2010 10:09 AM
Points: 803, Visits: 24

I think your sql is correct - the reason no rows are being returned is because there is no data that falls within the date range of your parameters.
If you change the sql to

((datod between '20020101' AND '20021231') OR (datdo between '20021201' AND '20021231')) you will see you get 1 row returned.

In your data set there are no rows that have datod or datdo between 01-Dec-2002 and 31-Dec-2002 which is what you have your variables set to.

Post #592067

AnzioBake

Posted Monday, October 27, 2008 7:06 AM

SSC Veteran

Group: General Forum Members
Last Login: Thursday, June 13, 2013 4:14 AM
Points: 210, Visits: 447

It looks like you are swaping the Variable and the columns
Based on your parameter and expected result.....


Declare
	@DatumOd SmallDateTime
	,@DatumDo SmallDateTime

Select 
	@DatumOd='20021201'
	,@DatumDo='20021231'

Select *
From #T1
Where 
	( @DatumOD >= Datod And @DatumOD <= Datdo )
	And 
	( @DatumDo >= Datod And @DatumDo <= Datdo )

Post #592069

Sergiy

Posted Monday, October 27, 2008 10:30 PM

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Group: General Forum Members
Last Login: Today @ 7:03 AM
Points: 4,557, Visits: 8,236

Martin,

Your question has nothing to do with T-SQL.
It's a task from school math.

To find the correct answer you need:
- stop browsing Internet for it;
- take a piece of paper;
- draw a time line on it;
- mark all time intervals from the table on the time line;
- mark the search interval on the same line.

Draw several different variations of the picture: with overlapping intervals, with one search interval covering several table intervals, etc.

Allocate 5 minutes of your time to analyze the pictures and figure out what are the criteria for selecting the right intervals.

I'm pretty sure you can find the answer.

Post #592616

Martin Zajicek

Posted Tuesday, October 28, 2008 2:40 AM

SSC Rookie

Group: General Forum Members
Last Login: Tuesday, December 11, 2012 7:47 AM
Points: 30, Visits: 117

Hello,

To Sergiy:
You are right. The first what I did was an analyze and developed diagram. Then I decided that I have to check every date from input range if it is between datod AND datdo.

May be I described my problem wrong. What I needed was join "utvar" from #T1 with every date from #T2. Table #T2 is created by input date range.

I have source data #T1:
cislo datod datdo utvar
3779 2002-04-01 00:00:00 2002-11-30 00:00:00 7003
3779 2002-12-01 00:00:00 2003-04-30 00:00:00 8007
3779 2003-05-01 00:00:00 2008-10-28 08:17:00 7003

Input date range:
@DatumOd='20030420'
@DatumDo='20030512'

Source data #T2:
cislo datum kodds hodin
3779 2003-04-23 00:00:00 100 495
3779 2003-04-24 00:00:00 100 450
3779 2003-04-25 00:00:00 100 585
3779 2003-04-28 00:00:00 100 495
3779 2003-04-29 00:00:00 100 495
3779 2003-04-30 00:00:00 100 450
3779 2003-05-02 00:00:00 100 450
3779 2003-05-05 00:00:00 100 435
3779 2003-05-06 00:00:00 100 495
3779 2003-05-07 00:00:00 100 495
3779 2003-05-09 00:00:00 100 435
3779 2003-05-12 00:00:00 100 495

This is result what I need:
cislo datum kodds hodin utvar
3779 2003-04-23 00:00:00 100 495 8007
3779 2003-04-24 00:00:00 100 450 8007
3779 2003-04-25 00:00:00 100 585 8007
3779 2003-04-28 00:00:00 100 495 8007
3779 2003-04-29 00:00:00 100 495 8007
3779 2003-04-30 00:00:00 100 450 8007
3779 2003-05-02 00:00:00 100 450 7003
3779 2003-05-05 00:00:00 100 435 7003
3779 2003-05-06 00:00:00 100 495 7003
3779 2003-05-07 00:00:00 100 495 7003
3779 2003-05-09 00:00:00 100 435 7003
3779 2003-05-12 00:00:00 100 495 7003

I used storedprocedure and "utvar" I got from:
SET @utvar2=(select utvar from #T1 where cislo=@cislo1 AND (@datum between datod and datdo))

On finally it looks very simply :) .

Thank you for your help and advice

Post #592676

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