How to iterate over a date range in PL/SQL

Question

I need to write a report that generates summary totals against a table with date ranges for each record.

table data:
option   start_date   end_date
opt1              


        

Answer 1

One solution that I use for this is to convert the date range into an integer range that you can use in a for loop, then convert back to a date to do stuff with it. You can't do any joins or anything this way, but it's a much smaller solution that those already posted:

declare
  start_date number;
  end_date number;
  business_date varchar2(8);
begin
  start_date := to_number(to_char(to_date('2013-04-25', 'yyyy-MM-dd'), 'j'));
  end_date := to_number(to_char(to_date('2013-05-31', 'yyyy-MM-dd'), 'j'));
  for cur_r in start_date..end_date loop
    business_date := to_char(to_date(cur_r, 'j'), 'yyyy-MM-dd');
    dbms_output.put_line(business_date);
  end loop;
end;