使用SQL查詢單個值

Question

我想從名爲wartung的表中獲取單個值（aktiv）。

include('blog/includes/db_connect.php'); 
$query = $db->prepare("SELECT * FROM wartung"); 
$query->execute(); 
$query->bind_result($wartung_id, $aktiv, $grund); 

數據庫活躍的值爲1
但是這個代碼不得到這1到$aktiv變量。

_{PS：我不習慣用MySQL和PHP編碼，所以如果有初學者bug請不要生氣。}

Answer 1

嘗試：

include('blog/includes/db_connect.php'); 
$query = $db->prepare("SELECT aktiv FROM wartung");// I am assuming your column is named aktiv 
$query->execute(); 
$query->bind_result($aktiv); 
$query->fetch(); 

Answer 2

你是不是fetching值

include('blog/includes/db_connect.php'); 
$query = $db->prepare("SELECT * FROM wartung"); 
$query->execute(); 
$query->bind_result($wartung_id, $aktiv, $grund); 
$query->fetch();