Hello, Lets suppose I have a table like this one id id_1 id_2 date_time 1 101 1000 2006-07-04 11:25:43 2 102 1001 2006-07-04 11:26:43 3 101 1005 2006-07-04 11:27:43 4 103 1000 2006-07-04 11:25:43 I want to find all records have same id_1, but different id_2 and have difference in time less than 5 minutes. In this case this is record 1 and record 3. How can I do this ? Thanks in advance for your help. Peter
