There are no warnings or errors in log. But there are some note like: NOTE: Character values have been converted to numeric values at the places given by: (Line):(Column). 16:27 16:48 16:67 16:88 16:105 NOTE: Invalid numeric data, rx_summ_dt_radiation='9/17/2013' , at line 16 column 27. NOTE: Invalid numeric data, rx_summ_date_chemo='5/10/2013' , at line 16 column 48. NOTE: Invalid numeric data, rx_summ_date_hormone='8/26/2013' , at line 16 column 67. NOTE: Invalid numeric data, rx_summ_date_transplnt_endocr_da='0/0/0' , at line 16 column 105. Do I need to convert the format of the date before using the min function?
... View more