How do I reset a sequence in Oracle?

Question

In PostgreSQL, I can do something like this:

ALTER SEQUENCE serial RESTART WITH 0;

Is there an Oracle equivalent?

Answer 1

In my project, once it happened that someone manually entered the records without using sequence, hence I have to reset sequence value manually, for which I wrote below sql code snippet:

declare
max_db_value number(10,0);
cur_seq_value number(10,0);
counter number(10,0);
difference number(10,0);
dummy_number number(10);

begin

-- enter table name here
select max(id) into max_db_value from persons;
-- enter sequence name here
select last_number into cur_seq_value from user_sequences where  sequence_name = 'SEQ_PERSONS';

difference  := max_db_value - cur_seq_value;

 for counter in 1..difference
 loop
    -- change sequence name here as well
    select SEQ_PERSONS.nextval into dummy_number from dual;
 end loop;
end;

Please note, the above code will work if the sequence is lagging.