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need to minus dates

Author

Topic

vijays3
Constraint Violating Yak Guru

354 Posts

Posted - 2010-04-26 : 05:41:19

Hi all

I am not able to create a code which may minus date 1 to date 2.
Date1 Date2
2010-04-23 08:12:55.000 2010-04-23 08:18:50.000
2010-04-23 08:18:51.000 2010-04-23 08:26:50.000
2010-04-23 08:26:51.000 2010-04-23 08:55:30.000
2010-04-23 08:57:05.000 2010-04-23 09:10:32.000
2010-04-23 08:58:48.000 2010-04-23 09:10:32.000

I have table t1 which has two date columns and others ...i have requirement in which i need to minus from date1 from date2 like this

(2010-04-23 08:18:50.000)-(2010-04-23 08:18:51.000)

next is

(2010-04-23 08:26:50.000)-(2010-04-23 08:26:51.000)

and so till the last

(2010-04-23 09:10:32.000)-(2010-04-23 08:58:48.000)

means from the first date value of DATE2 columns to second date value of DATE1 columns and it should be so on...

i think i explanined my problem properly

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2010-04-26 : 05:48:39

quote:
I have table t1 which has two date columns and others ...i have requirement in which i need to minus from date1 from date2 like this

(2010-04-23 08:18:50.000)-(2010-04-23 08:18:51.000)

You want the date different in second ? minutes ? hour ?
basically you can use datediff(<datepart>, <date 1>, <date 2>) and specify the corresponding <datepart> paramter

Refer to BOL http://msdn.microsoft.com/en-us/library/ms189794.aspx

Are you using SQL Server 2000 ? 2005 / 2008 ?

KH
[spoiler]Time is always against us[/spoiler]

vijays3
Constraint Violating Yak Guru

354 Posts

Posted - 2010-04-26 : 05:55:11

THANKS FOR YOUR REPLY ...I NEED IN HOUR ...

BUT IT SHOULD BE LIKE THIS DATE2(FIRST VALUE)-DATE1(SECOND VALUE)
AND AGIAN
DATE2(SECOND VALUE)-DATE1(THIRD VALUE)
NOW AGAIN
DATE2(THIRD VALUE)-DATE1(FOURTH VALUE)

AND SO ON....TILL THE LAST RECORD
I AM TRYING TO CREATE CURSOR BUT NOT ABLE TO BUILD THE LOGIC..pLEASE HELP ME

quote:
Originally posted by khtan

quote:
I have table t1 which has two date columns and others ...i have requirement in which i need to minus from date1 from date2 like this

(2010-04-23 08:18:50.000)-(2010-04-23 08:18:51.000)

You want the date different in second ? minutes ? hour ?
basically you can use datediff(<datepart>, <date 1>, <date 2>) and specify the corresponding <datepart> paramter

Refer to BOL http://msdn.microsoft.com/en-us/library/ms189794.aspx

Are you using SQL Server 2000 ? 2005 / 2008 ?

KH
[spoiler]Time is always against us[/spoiler]

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2010-04-26 : 05:59:24

[code]
declare @sample table
(
Date1 datetime,
Date2 datetime
)
insert into @sample
select '2010-04-23 08:12:55.000', '2010-04-23 08:18:50.000' union all
select '2010-04-23 08:18:51.000', '2010-04-23 08:26:50.000' union all
select '2010-04-23 08:26:51.000', '2010-04-23 08:55:30.000' union all
select '2010-04-23 08:57:05.000', '2010-04-23 09:10:32.000' union all
select '2010-04-23 08:58:48.000', '2010-04-23 09:10:32.000'

; with
cte
as
(
select Date1, Date2, row_no = row_number() over (order by Date1)
from @sample
)
select c1.Date1, c1.Date2, datediff(minute, c1.Date2, c2.Date1) / 60.0
from cte c1
left join cte c2 on c1.row_no = c2.row_no - 1

/*
Date1 Date2
------------------------------------------------------ ------------------------------------------------------ -------------------
2010-04-23 08:12:55.000 2010-04-23 08:18:50.000 .000000
2010-04-23 08:18:51.000 2010-04-23 08:26:50.000 .000000
2010-04-23 08:26:51.000 2010-04-23 08:55:30.000 .033333
2010-04-23 08:57:05.000 2010-04-23 09:10:32.000 -.200000
2010-04-23 08:58:48.000 2010-04-23 09:10:32.000 NULL

(5 row(s) affected)
*/
[/code]

KH
[spoiler]Time is always against us[/spoiler]

vijays3
Constraint Violating Yak Guru

354 Posts

Posted - 2010-04-26 : 06:31:31

Thank you very much for your quick response

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2010-04-26 : 06:38:18

[code]SELECT DATEDIFF(minute,t1.Date2,t.Date1)/60.0
FROM Table t
OUTER APPLY (SELECT TOP 1 Date2
FROM Table
WHERE Date2 < t.Date1
ORDER BY Date2 DESC)t1
[/code]

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

ms65g
Constraint Violating Yak Guru

497 Posts

Posted - 2010-04-26 : 07:29:50

[code]
;WITH c1 AS
(SELECT k=1, Date1, row_id = ROW_NUMBER() OVER(ORDER BY (SELECT 0))
FROM @sample),
c2 AS
(SELECT k=2, Date2, row_id = ROW_NUMBER() OVER(ORDER BY (SELECT 0)) + 1
FROM @sample)
SELECT ABS(DATEDIFF(minute, MAX(CASE WHEN k=1 THEN d END), MAX(CASE WHEN k=2 THEN d END))/60.0)
FROM
(
SELECT * FROM c1
UNION ALL
SELECT * FROM c2
)D(k,d,r)
GROUP BY r
[/code]

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