Richard Broersma Jr wrote: >> id id_1 id_2 date_time >> 1 101 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 ? > > I am sure that this will need some "tuning" to get it to work > correctly but should give you one > way to get what you want. > > select a.id, a.id_1, a.id_2, a.date_time > > from table1 a join table1 b on (a.id_1 = b.id_1) > where > a.id_2 != b.id_2 > and > abs( a.date_time - b.date_time) < ' 5 minutes' > ; ... maybe use 'a.id_2 < b.id_2' if you want to exclude double results. Yours, Laurenz Albe
