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Using loop to split data?

Author

Topic

phoenix22
Starting Member

20 Posts

Posted - 2005-12-12 : 21:23:09

I need to create a table with two columns. Basically, the inputs would be two dates (Start Date and End Date), and the created table would contain two columns with the date range broken out in 2 week intervals. So if my date range was 12/4/2005 to 12/31/2005, the table would look like below:

START_DATE END_DATE
12/4/2005 12/17/2005
12/18/2005 12/31/2005

I know I need a loop of some sort, does anyone have any idea as to how I could do this?

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2005-12-12 : 21:32:20

Simple while loop solution

declare
	@date_start	datetime,
	@date_end	datetime

select	@date_start	= '2005-12-04',
	@date_end	= '2005-12-31'

while @date_start <= @date_end
begin
	select 	@date_start, dateadd(day, 13, @date_start)
	select	@date_start = dateadd(day, 14, @date_start)
end

-----------------
[KH]

Michael Valentine Jones
Yak DBA Kernel (pronounced Colonel)

7020 Posts

Posted - 2005-12-12 : 22:15:32

This statment will do it without a loop using a number table.

You can get the code for the F_TABLE_NUMBER_RANGE function at:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=47685


select 
	date_start= dateadd(day, (a.number*14), a.dt),
	date_end = dateadd(day, (a.number*14)+13, a.dt)
from
	(
	select
		aa.number,
		DT =  convert(datetime,'2005/12/04')
	from
		dbo.F_TABLE_NUMBER_RANGE(0,99) aa
	) a

CODO ERGO SUM

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2005-12-12 : 22:27:42

The F_TABLE_NUMBER_RANGE is really cool

-----------------
[KH]
Learn something new everyday

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