Crystal Reports 2008 - help with formula to retrieve lastfullmonth

Question

Hi, I'm new to this forum.  First post.  I have a SQL query where
:month(CAST(a.LAST_MOD_DT / 86400 AS datetime) + CAST('01/ 01/1970' AS datetime)) = (MONTH(getdate())- 1)
I need to create a CR formula that will pull in data from last month as this report will be run on a monthly basis.  If I use 'getdate() -31' there will be a problem with the months that don't have 31 days.
I'm also very new with creating formulas so including an explaination would be helpful.  Thanks,
Joyce

Answer 1

Sorry for the slow repsonse in getting back to you.
I wasn't able to get the SQL query to work.  I did find one that does work except I need to find out how to pull in the minimum date and the maximum date of the records into the report.
Here's the SQL query:
--to query for the prior month,  if January then month = 12 else month = (current month - 1 month).
and
month(CAST(a.LAST_MOD_DT / 86400 AS datetime) + CAST('01/ 01/1970' AS datetime)) =
CASE WHEN cast(DATEPART(Month,GETDATE()) as datetime) = 01
                      THEN month(cast((str(12)+'/'+ str(01) +'/'+STR(YEAR(Getdate())-1)) as datetime))
                      ELSE MONTH(cast((str(DATEPART(Month,GETDATE())-1)+'/'+ str(01) +'/'+STR(YEAR(Getdate()))) as datetime)) END
--to query for the proper year, if January then year = (current year - 1 year) else year = current year.
and
year(CAST(a.LAST_MOD_DT / 86400 AS datetime) + CAST('01/ 01/1970' AS datetime)) =
CASE WHEN cast(DATEPART(Month,GETDATE()) as datetime) = 01
                      THEN year(cast((str(12)+'/'+ str(01) +'/'+STR(YEAR(Getdate())-1)) as datetime))
                      ELSE year(cast((str(DATEPART(Month,GETDATE())-1)+'/'+ str(01) +'/'+STR(YEAR(Getdate()))) as datetime)) END