Create a daily record from date ranges
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I have a table where each record shows an amount of money invested between two dates. I need to turn this into a second table that takes this value and spreads it evenly across each of those days then creates 1 record per day.
i.e.
from:
DescriptionValue From To
Spend 11000 01/01/200810/01/2008
to:
Date DescriptionValue
01/01/2008Spend 1100
02/01/2008Spend 1100
03/01/2008Spend 1100
04/01/2008Spend 1100
05/01/2008Spend 1100
06/01/2008Spend 1100
07/01/2008Spend 1100
08/01/2008Spend 1100
09/01/2008Spend 1100
10/01/2008Spend 1100
Would anyone have any idea how to achieve this?
Many thanks in advance,
John
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Heh... must be budget planning time again. This should do it, John.... I'm using Master.dbo.spt_Values as if it were a Tally table...
DECLARE @Description VARCHAR(20),@Value MONEY,@From DATETIME,@To DATETIMESELECT @Description = 'Spend 1',@Value = CONVERT(MONEY,'1000'),@From = '01/01/2008',@To = '10/01/2008'SELECT DATEADD(mm,t.Number,@From) AS [Date],@Description AS [Description],@Value/(DATEDIFF(mm,@From,@To)+1) AS [Value]FROM Master.dbo.spt_Values tWHERE t.Type = 'P'AND t.Number BETWEEN 0 AND DATEDIFF(mm,@From,@To)For more info on what a Tally table is and how it's used to replace many While Loops, please see the following article...
http://www.sqlservercentral.com/articles/TSQL/62867/
Oh yeah... almost forgot... the spt_Values table only has "P" values from 0 to 255. If you need more months than than, then you will need a Tally table and may need to make some minor mods to the code above to handle a Tally table that starts at 1. Of course, if you start it at 0, all you'll need to do is change the FROM clause and the word NUMBER to just N.
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally) -
Thanks for that Jeff - all working perfectly!
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...and thank you for the feedback!
--Jeff Moden
RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.Change is inevitable... Change for the better is not.
Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)
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