Need to count records and group count by date on Oracle
Unless I am missing something, your query would be something like this:

select created, count(*) CreatedCount
from yourtable
group by created
order by created;


See SQL Fiddle with Demo

Or if you have a time associated with the date, you can use TRUNC:

select trunc(created), count(*) CreatedCount
from yourtable
group by trunc(created)
order by trunc(created);


See SQL Fiddle with Demo