* Flag first and last dates (within each ID). * Ray. DATA LIST FIXED /id 1-1 (F) date1 3-12(ADATE) date2 14-23(ADATE). BEGIN DATA. 1 01-01-2000 01-04-2000 1 10-04-2001 11-01-2001 1 05-05-2000 05-25-2001 2 02-07-2000 12-06-2000 2 03-05-2000 03-15-2000 2 02-28-2000 02-28-2000 END DATA. FORMATS date1 date2 (ADATE12). * Say we want the first (oldest) date of date1. SORT CASES BY id date1. MATCH FILES FILE=* /BY=id /FIRST=first. * Say we want the last (most recent) date of date2. SORT CASES BY id date2. MATCH FILES FILE=* /BY=id /LAST=last. EXECUTE.