how can i run this query in code igniter

[eluser]rajneeshgobin[/eluser]
how can i write this kind of query in code igniter

basically it tells me which rows of my table has duplicates based on the selected parameters in this case role id and perm id

select roleID, permID, count(*) as NumDuplicates
from `role_perms`
group by roleID, permID
having NumDuplicates > 1

[eluser]CroNiX[/eluser]

Code:

$this->db
  ->select('roleID, permID')
  ->select('count(*) as NumDuplicates', FALSE)
  ->group_by(array('roleID', 'permID'))
  ->having('NumDuplicates > 1')
  ->get('role_perms')
  ->result();

Code:

//Produces
SELECT roleID, permID, count(*) as NumDuplicates
FROM (role_perms)
GROUP BY roleID, permID
HAVING NumDuplicates > 1

Haven't tried it as I don't have your tables, but probably something like that