Converting PL/SQL report to Chart

Question

All
how do i convert the following report to a chart.
declare
slimdate varchar(100);
begin
for c1 in (select DISTINCT(substr(logindate, 1, 13)) Users from tablename ) loop
     select count(*) into slimdate from tablename where logindate like ''||c1.Users||'%';
     dbms_output.put_line(c1.Users||','||slimdate);     
end loop;
end;

Answer 1

Combine the two SELECT statements into one:
SELECT c1.users, COUNT(*) slimdate
  FROM (select DISTINCT(substr(logindate, 1, 13)) Users from tablename) c1,
             tablename c2
WHERE c2.logindate LIKE c1.users||'%'Mike