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我有4个表。PHP Mysql选择多个表，并制作多维数组我有4个表格
学生（id_student，名）
主题（id_subject，SUBJECT_NAME）
subject_category（id_subject_category，id_subject，subject_category）
得分（id_score，id_student，id_subject，id_subject_category，得分）
public function score(){
$this->db->select('*');
$this->db->from('student');
$query0 = $this->db->get();
$data=$query0->result_array();
$j = 0;
while($j<count($data)){
$sql2= "SELECT * FROM score where score.id_student = ?";
$data2 = $this->db->query($sql2,$data[$j]['id_student']);
$data2 = $data2->result_array();
$data[$j]['score'] = $data2;
$j++;
}
return $data;
}
结果是
Array
(
[final] => Array
(
[0] => Array
(
[id] => 1
[name] => John
[score] => Array
(
[0] => Array
(
[id_score] => 1
[id_student] => 1
[id_subject] => 2
[id_subject_category] => 1
[score] => 90
)
[1] => Array
(
[id_score] => 2
[id_student] => 1
[id_subject] => 2
[id_subject_category] => 2
[score] => 70
)
[2] => Array
(
[id_score] => 3
[id_student] => 1
[id_subject] => 2
[id_subject_category] => 3
[score] => 60
)
)
)
)
)
我需要这样的
Array
(
[final] => Array
(
[0] => Array
(
[id] => 1
[name] => John
[score] => Array
(
[id_subject] => Array
(
[0] => Array
(
[id_score] => 1
[id_student] => 1
[id_subject_category] => 1
[score] => 90
)
[2] => Array
(
[id_score] => 2
[id_student] => 1
[id_subject_category] => 2
[score] => 70
)
[3] => Array
(
[id_score] => 3
[id_student] => 1
[id_subject_category] => 3
[score] => 60
)
)
)
)
)
)
什么那些之间的区别，我认为只是钥匙吧？ – Omi