Ich möchte eine gewisse Korrektur auf mein Ergebnis mit codeigniter

Question

einige Zeilen selben Tag haben. Ich möchte das als eins machen. für zB: 2016-11-02, nachmittags Englisch 1 und für mittags Englisch 11.nun als zwei entries.please hilf mir es als eine Zeile zu machen. Ich teile meine Modellfunktion hier

Modell

public function select_data() { 
    $this->db->distinct(); 
    $this->db->select('extt_std as std'); 
    $this->db->from('exam_time_table'); 
    $query = $this->db->get(); 
    if ($query->num_rows() > 0) { 
     foreach ($query->result() as $row) { 
      $row->standard = $row->std; 
      $data[] = $row; 

      $this->db->select('*'); 
      $this->db->from('exam_time_table'); 
      $this->db->where('exam_time_table.extt_std', $row->std); 
      $query = $this->db->get(); 
      $get = $query->result(); 

      foreach ($get as $row) { 
       if ($row->extt_sess == 'FN') { 
        $row->fornoon = $row->extt_sub; 
        $row->afternoon = ''; 
       } 
       if ($row->extt_sess == 'AN') { 
        $row->fornoon = ''; 
        $row->afternoon = $row->extt_sub; 
       } 
       $data[]=$row; 
      } 
     } 
     return $data; 
    } 
    return false; 
} 

mein Tisch

CREATE TABLE `exam_time_table` (
    `extt_id` int(10) NOT NULL, 
    `extt_date` date NOT NULL, 
    `extt_exam` varchar(20) NOT NULL, 
    `extt_std` varchar(10) NOT NULL, 
    `extt_sub` varchar(15) NOT NULL, 
    `extt_sess` varchar(10) NOT NULL, 
    `extt_year` varchar(10) NOT NULL 
) 

INSERT INTO `exam_time_table` (`extt_id`, `extt_date`, `extt_exam`, `extt_std`, `extt_sub`, `extt_sess`, `extt_year`) VALUES 
(1, '2016-11-01', 'Half Yearly', 'I-STD', 'Tamil', 'FN', '16-17'), 
(2, '2016-11-01', 'Half Yearly', 'II-STD', 'Tamil', 'FN', '16-17'), 
(3, '2016-11-01', 'Half Yearly', 'III-STD', 'Tamil', 'FN', '16-17'), 
(4, '2016-11-01', 'Half Yearly', 'IV-STD', 'Tamil', 'FN', '16-17'), 
(5, '2016-11-01', 'Half Yearly', 'XI-STD', 'Tamil-I', 'FN', '16-17'), 
(6, '2016-11-01', 'Half Yearly', 'X-STD', 'Tamil-I', 'FN', '16-17'), 
(7, '2016-11-01', 'Half Yearly', 'V-STD', 'Tamil', 'FN', '16-17'), 
(8, '2016-11-01', 'Half Yearly', 'VII-STD', 'Tamil', 'FN', '16-17'), 
(9, '2016-11-01', 'Half Yearly', 'VII-STD', 'Tamil', 'FN', '16-17'), 
(10, '2016-11-01', 'Half Yearly', 'VIII-STD', 'Tamil', 'FN', '16-17'), 
(11, '2016-11-01', 'Half Yearly', 'IX-STD', 'Tamil-II', 'AN', '16-17'), 
(12, '2016-11-01', 'Half Yearly', 'X-STD', 'Tamil-II', 'AN', '16-17'), 
(13, '2016-11-02', 'Half Yearly', 'I-STD', 'English', 'AN', '16-17'), 
(14, '2016-11-02', 'Half Yearly', 'II-STD', 'English', 'FN', '16-17'), 
(15, '2016-11-02', 'Half Yearly', 'IX-STD', 'English-I', 'FN', '16-17'), 
(16, '2016-11-02', 'Half Yearly', 'IX-STD', 'English-II', 'AN', '16-17'), 
(17, '2016-11-02', 'Half Yearly', 'X-STD', 'English-I', 'FN', '16-17'), 
(18, '2016-11-02', 'Half Yearly', 'X-STD', 'English-II', 'AN', '16-17'), 
(19, '2016-11-02', 'Half Yearly', 'III-STD', 'English', 'FN', '16-17'); 

Answer 1

Es wenig komplex ist, aber Ihr Problem lösen. Wenn jemand anderes besser geben kann als diese Lösung. Ich werde geschätzt.

public function select_data() { 
$this->db->distinct(); 
$this->db->select('extt_std as std'); 
$this->db->from('exam_time_table'); 
$query = $this->db->get(); 
if ($query->num_rows() > 0) { 
    foreach ($query->result() as $row) { 
     $row->standard = $row->std; 
     $data[] = $row; 

     $this->db->select('*'); 
     $this->db->from('exam_time_table'); 
     $this->db->where('exam_time_table.extt_std', $row->std); 
     $this->db->where('exam_time_table.extt_sess', 'AN'); 
     $subquery = $this->db->get_compiled_select(); 

     $this->db->select('*'); 
     $this->db->from('exam_time_table'); 
     $this->db->where('exam_time_table.extt_std', $row->std); 
     $this->db->where('exam_time_table.extt_sess', 'FN'); 
     $subquery2 = $this->db->get_compiled_select(); 

     $this->db->select('a.*,b.*'); 
     $this->db->from('('.$subquery.') a'); 
     $this->db->join('('.$subquery2.') b','a.extt_std=b.extt_std',''); 
     $get = $this->db->result(); 

     foreach ($get as $row) { 
      if ($row->extt_sess == 'FN') { 
       $row->fornoon = $row->extt_sub; 
       $row->afternoon = ''; 
      } 
      if ($row->extt_sess == 'AN') { 
       $row->fornoon = ''; 
       $row->afternoon = $row->extt_sub; 
      } 
      $data[]=$row; 
     } 
    } 
    return $data; 
} 
return false; 
}