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RompinRonny
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Quote RompinRonny Replybullet Topic: Select Last 12 weeks of data in a report
     Posted: 03 Apr 2008 at 8:27am
Hello All,

My first post as a CR XI newbie.  I have a report that we run each week on Thursday.  Right now, we select a start date for the report that is 12 full weeks back from the current week (we just change the start date in the report each week).  The report then generates a Cross-Tab by week for the period we require.
I would like to have Crystal calculate the last 12 full weeks by just prompting for the end date of the last full week.  I can set up the prompt, but I need a formula or procedure on calculating a start date by going back 12 weeks from the end date.  Does anyone have an idea on how I can do this? 
As I mentioned, I am a newbie and just received my copy of Brian's CR Encylopedia yesterday (lots of reading for me!)
I would appreciate any suggestions.  Thanks in advance.

Cheers,
RompinRonny


Edited by RompinRonny - 03 Apr 2008 at 8:59am
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jon2ryhme
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Quote jon2ryhme Replybullet Posted: 03 Apr 2008 at 10:38am
I think this would solve your problem,

@f_Start_Date:

DateAdd ("ww",-12 ,#1/1/2008#)

will give output as "10/9/2007 12:00AM"
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jon2ryhme
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Quote jon2ryhme Replybullet Posted: 03 Apr 2008 at 10:48am

@f_Start_Date:

DateAdd ("ww",-12 ,CDateTime ({?end_Date}))


if you pass "2/1/2008" to the parameter {?end_Date}

it will display "11/9/2007 12:00AM"
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RompinRonny
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Quote RompinRonny Replybullet Posted: 03 Apr 2008 at 10:56am
jon2rhyme,
 
Worked like a charm!  This is great, I can use it in a lot of similar reports.  Will be much easier to run the reports - we can just select the end date of the most recent week we want, then get 12 weeks back from that as well!
 
Thanks for the quick reply and the creative and concise solution.
 
Best regards,
RompinRonny
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