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06.09.2008 at 12:27PM PDT, ID: 23470242
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6.8

Demand Calcuations with SQL

Asked by r270ba in SQL Query Syntax, SQL Server 2005

Tags: , , ,

I am trying to do some inventory demand forecasting and I would like to keep it all server side with SQL (as opposed to an ASP.net page doing the calculating).  Can I do this with a SQL statement?  I am posting some psuedo code below...please let me know if you have any questions.Start Free Trial 
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--Delcare Varialbes--
--Busisness Days--
declare @BdPrvYr
declare @BdCurYr
 
--Total Usage By Month--
declare @LstYrPrvMntTotUsg
declare @LstYrCurMntTotUsg
 
--Total Usage By Business Day--
declare @LstYrPrvMntBdUsg
declare @LstYrCurMntBdUsg
 
--Weighted Extensions--
declare @LstYrPrvMntExt
declare @LstYrCurMntExt
 
--Trending Varialbes--
declare @CurYrTrnd
declare @PrvYrTrnd
declare @TrndFactor
 
--Estimated Period Usage Varialbes--
declare @EstPerUsg
 
--Forecasted Demand Varialbe--
declare @FrcstDmnd
 
--Initialize Business Days--
/*Array for BdPrvYr from 1-12 (for the months) for the number of business days per month last year*/
/*Array for BdCurYr from 1-12 (for the months) for the number of business days per month this year*/
 
--Set Total Usage By Month Variables--
set @LstPrvMntTotUsg = select sum(trxqty) from IV30300 where itemnmbr=@itemNumber and locncode=@location and docdate=/*This month last year - 1 month*/
set @LstCurMntTotUsg = select sum(trxqty) from IV30300 where itemnmbr=@itemNumber and locncode=@location and docdate=/*This month last year*/
 
--Set Total Usage By Business Day--
set @LstYrPrvMntBdUsg = @LstPrvMntTotUsg / /*Number of business days this month last year - 1 month*/
set @LstYrCurMntBdUsg = @LstCurMntTotUsg / /*Number of business days this month last year*/
 
--Calculate Extensions--
set @LstYrPrvMntExt = @LstYrPrvMntBdUsg * 2.0
set @LstYrCurMntExt = @LstYrCurMntBdUsg * 1.0
 
--Calcualate Trending Factors--
set @PrvYrTrnd = select sum(trxqty) from IV30300 where itemnmbr=@itemNumber and locncode=@location and docdate=/*This month last year's previous 3 months*/
set @CurYrTrnd = select sum(trxqty) from IV30300 where itemnmbr=@itemNumber and locncode=@location and docdate=/*This months previous 3 months*/
 
set @TrndFactor = (@CurYrTrnd - @PrvYrTrnd) / @PrvYrTrnd
 
--Calculate Estimated Period Usage--
set @EstPerUsg = (/*Number of busisness days this month*/ * ((@LstYrPrvMntExt + @LstYrCurMntExt) / 3.0))
 
--Calculate Forecasted Demand--
set @FrcstDmnd = @EstPerUsg + @TrndFactor%
[+][-]06.09.2008 at 01:25PM PDT, ID: 21746348

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[+][-]06.09.2008 at 03:49PM PDT, ID: 21747276

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About this solution

Zones: SQL Query Syntax, SQL Server 2005
Tags: Microsoft, SQL Server, 2005, SQL Statements
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Solution Provided By: JesterToo
Participating Experts: 2
Solution Grade: A
 
 
[+][-]06.10.2008 at 05:52AM PDT, ID: 21750691

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[+][-]06.10.2008 at 06:52AM PDT, ID: 21751244

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[+][-]06.10.2008 at 06:59AM PDT, ID: 21751311

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[+][-]06.10.2008 at 07:31AM PDT, ID: 21751620

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[+][-]06.10.2008 at 07:33AM PDT, ID: 21751652

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[+][-]06.10.2008 at 01:11PM PDT, ID: 21754647

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[+][-]06.10.2008 at 01:31PM PDT, ID: 21754790

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[+][-]06.11.2008 at 07:16AM PDT, ID: 21760246

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[+][-]06.22.2008 at 07:54PM PDT, ID: 21843243

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