請指導如何編寫笨

Question

這個代碼，我有一個有2000 questions名爲Questions表，我使用MySql數據庫和Codeigniter，我想要的是在笨select 10 PERCENT questions of total 2000 with a query。

Answer 1

在控制器

public function FunctionName() 
{ 
    $result = $this>model_name->get_question(); 
    print_r($result); 
} 

在型號

public function get_question() 
{ 
    #get all question count 
    $query= $this->db->query("SELECT * FROM question"); 
    $result = $query->result_array(); 
    $count = count($result); # returns 2000 

    $limit = ($count/100)*10; # returns 200 

    # select only limited question which set with $limit 
    $query= $this->db->query("SELECT * FROM question LIMIT $limit"); 
    $result = $query->result_array(); 
    return $result 
}