Php 在codeigniter3.0.0中从模型到控制器选择单个列

我对codeigniter是新手。 我只需要模型中的可用列，而不需要控制器中编写的代码来获得单个列

我的型号代码是：

public function  check_reservation($restaurant_id,$date,$people,$start_time,$end_time){    
    $sql="SELECT
    r.restaurant_id,r.restaurant_name,r.capacity,rs.start_time,rs.end_time,rs.people,rs.date,r.capacity - SUM(IFNULL(rs.people,0)) AS available FROM restaurant r
    LEFT JOIN reservation rs ON r.restaurant_id = rs.restaurant_id
    AND ".$date." = rs.`date`
    AND ".$people." = rs.`people`
    AND '".$start_time."' = rs.`start_time`
    AND '".$end_time."' = rs.`end_time`
    WHERE r.restaurant_id = ".$restaurant_id."
    GROUP BY r.`restaurant_id`";

    $query=$this->db->query($sql);
    return $query->result();
}

---

谢谢

不清楚您需要什么。如果您只想在控制器中获得一列，当您使用foreach（或for）进行迭代时，您需要输入列名

foreach ( $records as $record ) {
    echo $record['restaurant_name'];
    echo "<br/>";
}

foreach（$records作为$record）{
echo$record[“餐厅名称”]；
回声“
”；
}