Creating sequnces

Question

Hi all,
I tried to create a sequence by formatting numbers. eg. instead of '1' get' 0001'. but it throws an error in oracle 10g express edition. Please guide me, where i have went wrong!
CREATE SEQUENCE test_sequence
START WITH to_number('1', '0999')
INCREMENT BY 1;

Answer 1

i tried it like this
SQL> desc test_table
Name                                                  Null?    Type
ID                                                             VARCHAR2(10)
NAME                                                           CHAR(10)
SQL> create or replace trigger test_trigger before insert on test_table  referencing new as new for each row
  2  begin
  3  select to_char(test_seq.nextval,'0009999') into :new.id from dual;
  4  end;
  5  /
Trigger created.
SQL> insert into test_table (name) values ('abc')
  2
SQL> truncate table test_table;
Table truncated.
SQL> insert into test_table (name) values ('abc');
1 row created.
SQL> set lines 10000
SQL> select * from test_table;
ID         NAME
0000180   abc