Hi please kindly assist I have multiple datasets with the following variables Dataset 1 Subid;visit; flag; date; time Dataset 2 Subid;visit; flag; date; time Dataset 3 Subid;visit; date; time Dataset 4 Subid;visit; date; time I need to, 1- When flag is present in the dataset compare date and time for the flag across datasets across visits 2- When flag is not present in dataset compare date across mentioned datasets and across visits Thank you
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