f499a1c0_quences_in_Oracle__autonumber___Description
[Parameter] START WITH [Example] START WITH 1000 [Description] 
Specify the first sequence number to be generated. Use this clause to start an ascending sequence at a value greater than its minimum or to start a descending sequence at a value less than its maximum. For ascending sequences, the default value is the minimum value of the sequence. For descending sequences, the default value is the maximum value of the sequence. This integer value can have 28 or fewer digits.
How to use sequences in Oracle (autonumber)
Description