Crystal Reports for Rational Application Developer 設計工具指南

If Previous({file.QTY}) <> 0 Then
{file.QTY}/2
Else
{file.QTY}

If Previous ({customer.CUSTOMER ID}) = {customer.CUSTOMER ID} Then
"Repeated Value"
Else
""

If Remainder(Previous ({file.SERIALNUM}), 300) = 0 Then
"Beginning, new block"
Else
""