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Query based on date
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Lawson Business Intelligence/Reporting/Crystal
Query based on date
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JonA
Veteran Member
Posts: 1162
8/16/2010 7:01 PM
Can I create a query that will pull data based on a date calculation? I want to pull monthly purchase order information but only for 1 year back from the current date. So I can schedule the report to run at the end of each month and not have to change the date range every time. Something like <current date> - 365.
FireGeek21
Veteran Member
Posts: 84
8/16/2010 7:14 PM
In the Report -> Selection Formulas type:
{PurchaseOrderTable.PurchaseOrderDate} in CurrentDate-365 to CurrentDate
Arvin Ojales
Advanced Member
Posts: 24
8/16/2010 7:23 PM
Are you using ODBC connection? If using ODBC, you can add something like this to the WHERE clause of your select statement:
WHERE PO_DATE > SYSDATE - 365.
Arvin Ojales
Char
Veteran Member
Posts: 62
8/16/2010 7:42 PM
Depending on how you run your reports (if you use LBI or Enterprise for example where there are historical instances) CurrentDate and DataDate can produce very different results. I'd generally recommend using datadate and the record selection would be {PurchaseOrderTable.PurchaseOrderDate} in Date(year(datadate)-1, month(datadate), day(datadate)) to DataDate - this will also assure correct results for leap year
FireGeek21
Veteran Member
Posts: 84
8/16/2010 7:49 PM
Char,
Please explain the difference between CurrentDate and DataDate.
Thank you!
Char
Veteran Member
Posts: 62
8/16/2010 8:01 PM
DataDate is the date the query executed against the database whereas CurrentDate is the date you're looking at the report. Let's say for Example that you have a formula that says "if {table.field} = currentdate -1 then {table.amount}" and you run the report on Monday thereby creating a historical instance. If you go and look at that historical instance on Friday then the formula will try to display data for Thursday since it's the day before Friday and there will be none since you ran the report on Monday and you'll see 0. If the formula had used DataDate then the numbers stay consistent over time because you're always looking at that fixed point in time that is the date the query executed. This same type of issue can arise when you use certain functions such as LastFullMonth because they are based internally on the currentdate rather than than the datadate. I hope that's clear......
FireGeek21
Veteran Member
Posts: 84
8/16/2010 8:05 PM
THANK YOU CHAR!!!
Very clear explanation. Guess there are some reports I need to rewrite!
JonA
Veteran Member
Posts: 1162
8/17/2010 2:55 PM
I'm connecting via OLE DB. It looks like the solution is found after the query, within the report itself, letting Crystal do the work?
JonA
Veteran Member
Posts: 1162
8/19/2010 3:32 PM
Thanks Char! Your formula worked beautifully!
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