代码点火器联接表技术

Question

Guys on my database i have three tables containing data as shown on a link below. On tables class and subjects , ssid and csid are foreign key from members .

I joining tables using left join as shown in model code shown below. when i echo first_name, surname and class_name for John claudius it appears three times while for Alex massawe it appear only once. but if i add information for Alex massawe result will displayed out as many times as information for Alex massawe that are within subjects. I need your help so that information given out will not be repeated if add information on tables subjects for a person whose name already in tables members.

Tables within database

members

sid first_name surname
a001 alex massawe
a002 John claudius

class

id csid class_name
01 a001 baby_class
02 a002 Class_one

subjects

id ssid subject_name
01 a002 Mathematics
02 a002 literature
03 a002 Communication skills
04 a001 Mathematics

result table

sid first_name surname class_name
a002 John claudius Class_one
a002 John claudius Class_one
a002 John claudius Class_one
a001 alex massawe baby_class

codes

Models:

function get_particular($sid){
$this->db->select('*');
$this->db->from('members m');
$this->db->join('subjects s', 'm.sid=s.ssid', 'left');
$this->db->join('class c', 'm.sid=c.csid', 'left');
$this->db->where('m.sid', $sid);
$query = $this->db->get();
return $query->result_array();
}

Controller:

function particular($sid){
$sid=$this->uri->segment(3);
$this->load->model('names');

$this->data["names"]=$this->names_rank->get_particular($sid);
$this->load->view("view/details", $this->data);
}

view:

foreach($names as $name) {

echo $name['sid'].' '. $name['first_name'].' '. $name['surname'].' '.$name['class_name'];
}

Answer 1

Try removing the foreach loop just echo the result

echo $names['sid'].' '. $names['first_name'].' '. $names['surname'].' '.$names['class_name'];

If you need to loop, try loop foreach member then echo $names