Various Times From Various Dates

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Various Times From Various Dates

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AskSQLTeam
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Posted - 2006-08-29 : 09:36:08

Jeff writes "I am trying to write a query to retrieve information that was processed between two times of the day (2:00 pm to 6:00 pm) from a date range... I am perplexed; I am new to SQL and am trying not to become frustrated, but this seems to be beyond my skill level. Any guidence would be greatly appreciated!"

madhivanan
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22864 Posts

Posted - 2006-08-29 : 09:54:46

http://www.sql-server-performance.com/fk_datetime.asp

Madhivanan

Failing to plan is Planning to fail

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2006-08-29 : 09:55:05

select * from mytable where processdatecolumn between sometime and othertime

Peter Larsson
Helsingborg, Sweden

Srinika
Master Smack Fu Yak Hacker

1378 Posts

Posted - 2006-08-29 : 11:14:34

[code]select * from UrTbl where
Convert(datetime, CONVERT(varchar(30), Date_Col, 101)) between @StartDate and @EndDate and
Convert(datetime, CONVERT(varchar(30), Date_Col, 108)) between @StartTime and @EndTime[/code]

Srinika

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2006-08-29 : 12:08:21

quote:

Originally posted by Srinika

select * from UrTbl where 
	Convert(datetime, CONVERT(varchar(30), Date_Col, 101)) between @StartDate and @EndDate and
	Convert(datetime, CONVERT(varchar(30), Date_Col, 108)) between @StartTime and @EndTime

Srinika

You should always avoid using conversion on dates when comparing.
Read the Article I posted

Madhivanan

Failing to plan is Planning to fail

Srinika
Master Smack Fu Yak Hacker

1378 Posts

Posted - 2006-08-29 : 12:47:56

Madhi,

How should the time portion is compared ?

I assumed: Within a given date range, and within a certain time range in each day

eg.
If the following is needed (Date From Aug 01 2006 to Aug 31 2006 and the time in between 8.30 AM & 5.00 PM)

how to compare the 2 time parts

will this work ?

select * from UrTbl where 
	dateadd(day, 0, datediff(day, 0, Date_Col)) between @StartDate and @EndDate and
	Date_Col - dateadd(day, 0, datediff(day, 0, Date_Col)) between @StartTime and @EndTime

Srinika

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2006-08-30 : 12:43:04

Try it. I think it should work

Madhivanan

Failing to plan is Planning to fail

nr
SQLTeam MVY

12543 Posts

Posted - 2006-08-30 : 12:50:12

you might also consider

select * from UrTbl where
Date_Col between @StartDate and @EndDate + 1
dateadd(day, 0, datediff(day, 0, Date_Col)) between @StartDate and @EndDate
and Date_Col - dateadd(day, 0, datediff(day, 0, Date_Col)) between @StartTime and @EndTime

The date comparison would have a chance of using an index

==========================================
Cursors are useful if you don't know sql.
DTS can be used in a similar way.
Beer is not cold and it isn't fizzy.

Michael Valentine Jones
Yak DBA Kernel (pronounced Colonel)

7020 Posts

Posted - 2006-08-30 : 13:59:40

You could do it like this:


declare @start_date datetime
declare @end_date datetime
declare @start_time datetime
declare @end_time datetime

select
	@start_date = '20060801',
	@end_date   = dateadd(dd,1,'20060831'),
	@start_time = '08:30:00.000',
	@end_time   = '17:00:00.000'

select *
from
	MyTable a
where 
	a.MyDate >= @start_date and
	a.MyDate <  @end_date   and
	-- Time Only Function: F_TIME_FROM_DATETIME
	-- http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=65358
	dbo.F_TIME_FROM_DATETIME( a.MyDate ) >= @start_time and
	dbo.F_TIME_FROM_DATETIME( a.MyDate ) <  @end_time

CODO ERGO SUM

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