06-04-2018 10:13 AM
06-04-2018 10:30 AM
SAS stores dates as counts of days (from a given starting point, which is 1960-01-01). The difference in days between two dates can therefore be calculated with a simple subtraction.
06-05-2018 03:25 AM
I have not got it to work in 7.4 but in 8.2 it works by using relative period and set offset to -1 and using "Inherit".
It works with days, but if you have a gap between the days you will get a missing value.