Halu.. i wanna ask about inserted records using sequence. I created a seq for table t1. I insert 10 rows or record and the id (which is the pk) shows the records in order (1.2.3.4.5.6.7.8.9.10). Then i delete one of the record (where id=3). I inserted one record into table t1 but when i select back the id appeared to be not in order which is id=1,2,11,4,5,6,7,8,9,10. Why is this happening? Why the next record is inserted in the space of id=3 whihch i had deleted? And how to resolve this?