Im trying to fill a primary key field of a target using a trigger on the table to insert a sequence number for each insertion of a new row.After running the session im finding that the key column is populated ,but,not in an order. the key field starts with some 75 goes till 200,the again 551 comes and goes till 10500 ,suddenly the next key field is filled with 21 and goes till 72.... is there any reason why this is happening in this reason.FYI : i truncated the table data ,then dropped the seq. and the trigger and created them freshly ,specifying the start value in seq. as "1"still the same problem :(