Using average days between dates to predict a launch date on another produc

I hope someone might be able to help me out here.
I am at the limit of my Webi expertise! (which is not saying a lot)
We have a universe containing date information relating to the launch of products thus:
Product Name
Supplier Name
Category
Sample Availability Date
Testing Start Date
Launch Go Date
It is a simple matter to create a variable u2018Project Timeu2019 as DaysBetween(Testing Start Date;Launch Go Date)
And using the Average function we can create Average Project Length - Also with the Report, and Section keywords we can show the global average, and averages by Supplier and Category.
Here is my problem.
We also have Products in the universe that have yet to have their projects kicked off, so Testing Start Date and Launch Go Date for those products are null data. I want to use the Sample Availability Date and the Average Project Length variable to predict the probable Launch Go date, however, in the report this element shows up as an empty cell.
Does anyone have an idea how I might achieve this?
Many Thanks
Mark

OK...
Lets imagine there are records for 100 devices in the universe. 75 of them have valid project start dates and launch dates. 25 of them have neither because those projects are yet to start. However they do have a sample availability date.
Using the DaysBetween function I can create a variable called project length from the start and launch dates. I can then use the Average function to get the average project length (for the devices that actually have a project length)
Somehow I want to add this average project length to the sample availability date on the records that have yet to have a start date.
As projects end they will add to the average, and we can see how close they were to the predicted launch. As new records are added they will automatically have a predicted date.
Right now I have the average project length, If I create a table filtering on completed projects (Projects with a non-null launch date) and I add a column showing average project length, because I've used the In Report keyword on the average, it shows the average value in this table.
If I have a stand-alone cell with the average project length it shows the right value
But if I have a table showing the devices yet to start (filtering on Null start date) If I add the average project length into that table it shows as blank (I.e. no value at all)
Hope this helps

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CLASS date_diff DEFINITION.
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ENDCLASS."
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ENDMETHOD."
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Hi,
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exporting
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IMPORTING
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    E_MONTHS             = EMONTHS
    E_YEARS              = EYEARS.
WRITE:/ 'Difference in Days   ', EDAYS.
WRITE:/ 'Difference in Months ', EMONTHS.
WRITE:/ 'Difference in Years ', EYEARS.
INITIALIZATION.
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There is no seperate FM for this, u have to use three FM.
If possible using these three FM code u can create an FM.
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*   MODIFY_INTERVAL                   = ' '
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*   OTHERS                            = 2
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Message was edited by:
        Judith Jessie Selvi

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What is the formula to find the months and days between dates

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Hello -
I've been tearing my hair out over this problem i'm trying to solve, probably just been staring at it too long which is making it worse -
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I've adapted this from a function on my blog. you will need to add set the YourTicketTable to where ever your tickets are stored.
CREATE
FUNCTION [dbo].[CalcWorkDaysBetween](@StartDate
As DateTime,@EndDate
AS DateTime)
RETURNS
INT AS
BEGIN
SET @EndDate
=DATEADD(DAY,1,@EndDate)
DECLARE @Count
AS Int= 0
DECLARE @Date
As Date=@StartDate
WHILE @Date
< @EndDate
BEGIN
IF (DATEPART(WEEKDAY,@Date)IN(1,7)
OR (SELECT
Count(*)
FROM YourTicketTable WHERE TicketDate=@Date)=1)
BEGIN
SELECT @Count = @Count
+ 1
END
SELECT @Date=DATEADD(Day,
1,@Date)
END
RETURN
DATEDIFF(DAY,@StartDate,@EndDate)- @Count
END
Regards,

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Hi experts,
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Hi,
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Rgds,
Mark
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DATA:
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TYPES: BEGIN OF ty_result,
company      TYPE char20,
compnr       TYPE i,
city         TYPE char30,
country      TYPE char30,
END OF ty_result.
DATA:
gt_rawtab    TYPE TABLE OF string,
gw_rawtab    LIKE LINE OF gt_rawtab,
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Post Author: sher
CA Forum: Crystal Reports
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Hi all,
i have a requirement, to calculate the difference between 2 dates, in days.
eg: 01/08/2007 and 05/08/2007.
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But here my actual requirement is i have to calculate this difference excluding weekends (saturday n sundays).
eg: 01/08/2007 -
Thursday
     05/08/2007 -
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srinivas

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Here you go Grace - this shows the number for ALL invoices...we created a Formatted Search (FMS) that resides on the Business Partner Master Data window
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Hope this helps...
Zal
--FMS 6BP Average Lapsed Days Ver 1 ZP 2010 07 21
--DESCRIPTION: SQL shows AVERAGE days between the posting of an invoice and the
--application of the customers payment for an FMS on Business Partner.
--AUTHOR(s):
--Version 1 Zal Parchem 2010 07 21
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I know I can use the DATEDIFF
How can I write it if StartDate and EndDate are in these formats?
StartDate: 2006-09-20 00:00:00.000
EndDate: 2013-09-20 18:20:53.000
I want to find the number of days between dates of dates in the two columns

Those work great, What if I want to use values from a table?
I have a column called StartDate and a column called EndDate with dates in it. I just what it to show the StartDate in a column, the Endate in column and the number of days in a column.
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Based on your description, do you want to display the following result?
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GO
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SELECT DateTest.StartDate, DateTest.EndDate,
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Lydia Zhang

How to get one day back data from selecting date .

Hi Experts,
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Regards
Dinesh

first capture Date on univers by simply using your formula
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create another variable called
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Thanks,
Swapnil

Using average days between dates to predict a launch date on another produc

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