How to order row by specific value? MySQL CodeIgniter - php

Question

I have a issue.
My sql query don't work in codeigniter, when i try to order by specific value
Here's example:
$this->db->select('*');
$this->db->from('Questions');
$this->db->where('Questions.Status !=', 0);
$this->db->order_by('IdQuestion', 'DESC');
$this->db->order_by('(CASE WHEN Status = 3 THEN 1 ELSE 2 END)', 'DESC'); //Here's wrong...
But i don't receive valid result.
Someone can help.
Second order_by statement is wrong.
CASE don't work correct.

Answer 1

You can try this solution for your problem :
<?php
$sub_query_from = '(SELECT Questions.*, (CASE WHEN Questions.Status = 3 THEN 1 ELSE 2 END) as questions_status from Questions WHERE Questions.Status != 0 ORDER BY IdQuestion DESC) as sub_questions';
$this->db->select('sub_questions.*');
$this->db->from($sub_query_from);
$this->db->order_by('sub_questions.questions_status', 'DESC');
$query = $this->db->get();
$result = $query->result();
echo "<per>";
print_r($result);
exit;
?>
Hope it will helps.

Answer 2

My solutions is that:
To create view which will contains all results ordered, before select this view in codeigniter model
Example:
select (case when (`parajurist`.`intrebari`.`Status` = 2) then 1 else 2 end)
AS `Second`,`parajurist`.`intrebari`.`IdIntrebare` AS
`IdIntrebare`,`parajurist`.`intrebari`.`Titlu` AS
`Titlu`,`parajurist`.`intrebari`.`Descriere` AS
`Descriere`,`parajurist`.`intrebari`.`NumePrenumeP` AS
`NumePrenumeP`,`parajurist`.`intrebari`.`EmailP` AS
`EmailP`,`parajurist`.`intrebari`.`Status` AS
`Status`,`parajurist`.`intrebari`.`IdCategorie` AS
`IdCategorie`,`parajurist`.`intrebari`.`DataAdresare` AS
`DataAdresare`,`parajurist`.`intrebari`.`Comments` AS
`Comments`,`parajurist`.`intrebari`.`CuvCheie` AS `CuvCheie` from
(`parajurist`.`intrebari` join `parajurist`.`intrebaricategorii`
on((`parajurist`.`intrebaricategorii`.`IdCategorie` =
`parajurist`.`intrebari`.`IdCategorie`))) where
(`parajurist`.`intrebari`.`Status` <> 0) order by (case when
(`parajurist`.`intrebari`.`Status` = 2) then 1 else 2
end),`parajurist`.`intrebari`.`IdIntrebare` desc
and codeigniter code:
$this->db->limit($start, $stop);
$this->db->select('*');
$this->db->select('LEFT(intrebari_view.Titlu, 50) as Titlu');
$this->db->select('LEFT(intrebari_view.Descriere, 150) AS Descriere');
$this->db->join('IntrebariCategorii', 'IntrebariCategorii.IdCategorie = intrebari_view.IdCategorie');
$this->db->where('IntrebariCategorii.NumeCategorie', $cat);
$this->db->from('intrebari_view');
$query = $this->db->get();