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Perform calculation on previous record

mmarc442

Hello. Can someone provide advice on how to perform a calculation at the Detail row level which compares a value in the current record to that in a previous record ? If my data is
Customer OrderDate
Alpha March 15
Alpha March 17
Beta March 17
Alpha March 23
Beta March 27
is there a way to report
Customer OrderDate DaysSinceLastOrder
Alpha March 15
Alpha March 17 2
Beta March 17
Alpha March 23 6
Beta March 27 10

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Comments

wwilliams

Will this help?
http://www.birt-exchange.org/org/forum/index.php/topic/21623-calculate-from-previous-row/

mmarc442

Great ! Thanks !~