Hello everyone,   I have A CSV file containing the list of individuals with their ICD diagnosis on multiple dates. The data looks as below:   ID ICD VERSION ICD CODE DIAGNOSIS DATE M0058 ICD-9 733.42 19-06-14 M0058 ICD-9 733.42 19-09-14 M0058 ICD-9 733.42 18-12-14 M0058 ICD-9 733.42 03-12-15 M0058 ICD-9 733.42 24-12-15 M0058 ICD-9 733.42 31-12-15   I would like to create a new SAS dataset with the list of observations along with their first ICD diagnosis. For the above case, I would like to retain only "M000000058" "ICD-9" "733.42" "19-06-14" Thanks in advance ... View more