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How to get the nearest date

Author

Topic

Villanuev
Constraint Violating Yak Guru

478 Posts

Posted - 2011-10-25 : 21:45:18

Guys,

I have this scripts but when I run i have some problem getting the nearest date of TABLE1 "Receiptdate" to TABLE2 "Shipdate"
some of the records are correct but i notice there are some records are not correct especially like this sample below.
can you modify my script. Thanks.

my script getting this result "2011-02-02" to "2011-08-16"
The correct result should be "2011-05-24" to "2011-08-16"

here is the script:
Select
t2.ESN,
t2.shipdate,
min(t1.receiptdate) as AsiaReceiptdate
--Into #Data
From TABLE1 as t2
Left Outer Join TABLE2 as t2
On t1.esn = t2.esn
and t2.receiptdate > t1.Shipdate
where
(
t2.Shipdate between('2011-01-01 00:00:00') and ('2011-09-30 23:59:59')
and
t2.type_id = 10
)
Group by t2.ESN, t2.shipdate
order by asiareceiptdate

TABLE1
---------------------
ESN--RECEIVEDATE--TYPE
---------------------
123--2011-08-16--10

TABLE2
---------------------
ESN--SHIPDATE
--------------------
123--2011-02-02
123--2011-05-24
123--2011-09-03

Note:
How to get all my post here in SQLteam site.
I will check some of my previous post.

Regards,

JOV

Villanuev
Constraint Violating Yak Guru

478 Posts

Posted - 2011-10-25 : 23:13:42

I modify my scripts and given me the correct result.
what is your thoughs on my scripts. thanks.
Select
t1.ESN,
t1.Receivedate,
min(t2.shipdate) as shipdate
--Into #Data
From TABLE1 as t1
Left Outer Join TABLE2 as t2
On t1.esn = t2.esn
and t2.shipdate < t1.receivedate
where
(
t1.receievdate between('2011-01-01 00:00:00') and ('2011-09-30 23:59:59')
and
t2.type_id = 10
)
Group by t1.ESN,
t1.receivedate
order by t1.receivedate

regards,

JOV

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-10-26 : 01:18:28

what you're doing is effectively a hidden rbar triangular join

see

http://www.sqlservercentral.com/articles/T-SQL/61539/

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-10-26 : 01:22:38

i think you would be better off implementing it as below


Select
t1.ESN,
t1.Receivedate,
t2.shipdate 
From TABLE1 as t1
cross apply (select min(t2.shipdate) as shipdate 
from TABLE2 
where t1.esn = esn 
and type_id = 10 
and shipdate < t1.receivedate
)as t2
where t1.receievdate >='2011-01-01'
t1.receievdate <'2011-10-01'
order by t1.receivedate

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

Villanuev
Constraint Violating Yak Guru

478 Posts

Posted - 2011-10-26 : 03:01:59

Hi Visakh16

waht is the difference between this two format of date.
1. t1.receievdate between('2011-01-01 00:00:00') and ('2011-09-30 23:59:59')
2. t1.receievdate >='2011-01-01' and t1.receievdate <'2011-10-01'

Regards,

JOV

Villanuev
Constraint Violating Yak Guru

478 Posts

Posted - 2011-10-26 : 03:32:37

Hi visakh15

There are some error on the result in shipdate
instead of this date 2011-08-16, the other date was getting from the script (2011-02-11) and also it display like this.

TABLE1
---------------------
ESN--RECEIPTDATE--RMA_TYPE_ID
----------------------------------------
123--2011-09-22--2

TABLE2
---------------------
ESN--SHIPDATE
--------------------
123--2011-08-16
123--2011-02-11

Select
rma.ESN,
rma.modelName,
rma.SupplierId,
es.shipdate,
rma.Receiptdate
From TABLE1 as rma
cross apply (select min(shipdate) as shipdate
from TABLE2
where rma.esn = esn
and rma.receiptdate > shipdate
)as es
where rma.receiptdate >='2011-01-01' and
rma.receiptdate <'2011-10-01'
and rma.rma_type_id=2
order by rma.receiptdate

NOTE:

just replace the min(shipdate) to max(shipdate) and the result is okay. also change the location of rma_type_id.

Thanks,

JOV

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-10-26 : 12:35:10

quote:
Originally posted by Villanuev

Hi Visakh16

waht is the difference between this two format of date.
1. t1.receievdate between('2011-01-01 00:00:00') and ('2011-09-30 23:59:59')
2. t1.receievdate >='2011-01-01' and t1.receievdate <'2011-10-01'

Regards,

JOV

first case has a slight chance of missing some records if they happen to come after 23:59:59 ( ie in between last second like 23:59:59.213 etc) please keep in mind that datetime field in sql server stores upto 3/1000 of second precision so using second method is faultproof to make sure we're not missing anything

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

X002548
Not Just a Number

15586 Posts

Posted - 2011-10-26 : 13:32:37

See, here I was gonna say, go to your local bar or corner

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

Want to help yourself?

http://msdn.microsoft.com/en-us/library/ms130214.aspx

http://weblogs.sqlteam.com/brettk/

http://brettkaiser.blogspot.com/

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-10-26 : 13:43:03

quote:
Originally posted by Villanuev

Hi visakh15

There are some error on the result in shipdate
instead of this date 2011-08-16, the other date was getting from the script (2011-02-11) and also it display like this.

TABLE1
---------------------
ESN--RECEIPTDATE--RMA_TYPE_ID
----------------------------------------
123--2011-09-22--2

TABLE2
---------------------
ESN--SHIPDATE
--------------------
123--2011-08-16
123--2011-02-11

Select
rma.ESN,
rma.modelName,
rma.SupplierId,
es.shipdate,
rma.Receiptdate
From TABLE1 as rma
cross apply (select min(shipdate) as shipdate
from TABLE2
where rma.esn = esn
and rma.receiptdate > shipdate
)as es
where rma.receiptdate >='2011-01-01' and
rma.receiptdate <'2011-10-01'
and rma.rma_type_id=2
order by rma.receiptdate

NOTE:

just replace the min(shipdate) to max(shipdate) and the result is okay. also change the location of rma_type_id.

Thanks,

JOV

i just took it from your original script. if what you want is latest date before the required date you should be using max itself

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

X002548
Not Just a Number

15586 Posts

Posted - 2011-10-26 : 15:00:05

oh, come on..that was funny

9/3 is closer btw

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

Want to help yourself?

http://msdn.microsoft.com/en-us/library/ms130214.aspx

http://weblogs.sqlteam.com/brettk/

http://brettkaiser.blogspot.com/

X002548
Not Just a Number

15586 Posts

Posted - 2011-10-26 : 15:28:46

[code]

CREATE TABLE myTABLE1 (ESN int, RECEIVEDATE date, TYPE int)
CREATE TABLE myTABLE2 (ESN int, RECEIVEDATE date)
GO

INSERT myTable1 (ESN, RECEIVEDATE, TYPE)
SELECT 123, '2011-08-16', 10

INSERT myTable2 (ESN, RECEIVEDATE)
SELECT 123, '2011-02-02' UNION ALL
SELECT 123, '2011-05-24' UNION ALL
SELECT 123, '2011-09-03'
GO

SELECT * FROM myTABLE1 l1 INNER JOIN myTABLE2 r1 ON l1.ESN = r1.ESN
WHERE EXISTS(SELECT l.ESN
FROM myTABLE1 l
INNER JOIN myTABLE2 r
ON l.ESN = r.ESN
GROUP BY l.ESN
HAVING MIN(ABS(DATEDIFF(dd,l.RECEIVEDATE, r.RECEIVEDATE))) = ABS(DATEDIFF(dd,l1.RECEIVEDATE, r1.RECEIVEDATE))
)
GO

DROP TABLE myTABLE1, myTABLE2
GO

[/code]

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

Want to help yourself?

http://msdn.microsoft.com/en-us/library/ms130214.aspx

http://weblogs.sqlteam.com/brettk/

http://brettkaiser.blogspot.com/

Villanuev
Constraint Violating Yak Guru

478 Posts

Posted - 2011-10-26 : 22:50:36

Thank you guys for the help.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2011-10-27 : 02:26:55

wc

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

X002548
Not Just a Number

15586 Posts

Posted - 2011-10-27 : 08:48:57

What did you use?

Did you realize you had the wrong closest date? Unless this is "The Price is right" and you're not allowed to go over???

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

Want to help yourself?

http://msdn.microsoft.com/en-us/library/ms130214.aspx

http://weblogs.sqlteam.com/brettk/

http://brettkaiser.blogspot.com/

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