04-02-2015 02:05 PM
I have a dataset (patients) as such:
Pat_ID Hos Date
A 11 1/1/2012
B 12 2/3/2012
B 13 2/3/2012
C 11 4/1/2012
C 11 4/5/2012
How do I count using proc sql such that the outcome looks something like this:
Since B has two visits on the same date, they are considered as only 1 visit, whereas C has 2 visits because they are on different dates.
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