Reset the sequence

Question

Hi,
I have a set of statements in the procedure as below :
This is a daily job. we are planning to reset the Sequence on daily basis.
Is there any other way instead of resetting the sequence?  We are resetting because todays number may come tomorw also.
select SEQ_NAME.nextval into No_Col from dual;
insert into table
    (No,NoDAYWISE,Method)
    values ( No_Col, to_char(sysdate, 'DD') || to_char(sysdate, 'MM') ||
           to_char(sysdate, 'YY') || No_Col, 10)
This is the table structure
No
NoDAYWISE
Method
181
300813181
421
161
160813161
421
201
160913201
421
Thanks in advance.

Answer 1

I agree with Paul's comment. Sequences are meant to generate unique numbers.
If you are bend to implement this, below script might help you:
drop sequence test_seq;
create sequence test_seq start with 1 nocycle nocache;
select test_seq.nextval from dual;
select test_seq.nextval from dual;
select test_seq.nextval from dual;
select test_seq.nextval from dual;
select test_seq.nextval from dual;
set serveroutput on;
declare
  v_num number;
begin
  select 1 - test_seq.nextval into v_num from dual;
  dbms_output.put_line('Before reset Seq val :: ' || v_num);
  execute immediate 'alter sequence test_seq increment by ' || v_num;
  select test_seq.nextval into v_num from dual;
  dbms_output.put_line('After reset Seq val ::' || v_num);
  execute immediate 'alter sequence test_seq increment by 1';
end;
An easier way to achieve is, drop the sequence and create it again; this and even the above, I do not recommend.