How to change the Oracle Sequence Value using loop

declare

l_MaxVal pls_integer;

l_Currval pls_integer default - 1;

begin

select max(column_using_sequence)

into l_MaxVal

from table_name;

while l_Currval < l_Maxval

loop

select sequence_name.nextval

into l_Currval

from dual;

end loop;

end;

Example:

declare

l_MaxVal pls_integer;

l_Currval pls_integer default - 1;

begin

select max(ACCOUNTID)

into l_MaxVal

from ACCOUNT;

while l_Currval < l_Maxval

loop

select ACCOUNT_SEQ.nextval

into l_Currval

from dual;

end loop;

end;