I have a table with multiple fragments of continues enrollment. I marke with astericks  records after gap in dates memid   EnrDate   enrTermDate 92222   01/10/2009  02/12/2009 92222   02/13/2009  03/22/2009   92222   03/30/2010  04/29/2010 * 92222   05/30/2010  06/10/2010 92222   06/12/2010  10/13/2010 * 92222   10/14/2010  12/31/2010  have to extract: - those records for each patients after gap in dates between fragments of enrollment .  For example, I need for the patient with memid=92222 92222   03/30/2010  04/29/2010 * 92222   06/12/2010  10/13/2010 * How can I implement it with ode?   Could you please give me a hand? Thank you in advance,   Irin