從數據庫中刪除數據

我正在設計一個預約系統，我需要知道當另一個用戶已經接受預約時，如何從數據庫中刪除約會（因此不再顯示）。從數據庫中刪除數據

<?php 
{ 
    mysql_connect("localhost" , "" , "" or die (mysql_error()); 
    mysql_select_db("") or die(mysql_error()); 


    $pid=intval($_SESSION["Patient_id"]); $query = "SELECT t1.*, t2.Doctor_name, t2.Doctor_room FROM Appointment AS t1 INNER JOIN Doctor AS t2 ON t1.Doctor_id=t2.Doctor_id"; 

    //executes query on the database 
    $result = mysql_query ($query) or die ("didn't query"); 

    //this selects the results as rows 
    $num = mysql_num_rows ($result);  

    //if there is only 1 result returned than the data is ok 
    if ($num == 1) {} 
    { 
     $row=mysql_fetch_array($result); 
     $_SESSION['Appointment_date'] = $row['Appointment_date']; 
     $_SESSION['Appointment_time'] = $row['Appointment_time']; 
     $_SESSION['Doctor_name'] = $row['Doctor_name']; 
     $_SESSION['Doctor_room'] = $row['Doctor_room']; 
    } 
}

上面的代碼目前允許用戶預約。我需要時間和日期不顯示，如果它已被採取。

謝謝！

來源

2013-04-01 user2216325

您使用的是如果約會是採取標記和表中沒有..和哪場並且請糾正你假設的第一條線mysql_connect（「localhost」，「」，「」）或死（mysql_error（））;'？ – alwaysLearn

[mysql_ *]（http://news.php.net/php.internals/53799）擴展名已被棄用，您應該使用[PDO]（http://php.net/manual/en/book.pdo .php）或[mysqli]（http://php.net/manual/en/book.mysqli.php）。 – doublesharp

顯示我的表你的SQL結構'Appointment' – shnisaka

您shold在表指定表中的布爾字段將其標記爲採取或不..我認爲它作爲'Appointment_taken ...如果這是0，那麼任命仍然採取..

然後您可以檢查的條件如下

  <?php 
     { 
      mysql_connect("localhost" , "" , "") or die (mysql_error()); 
      mysql_select_db("") or die(mysql_error()); 


      $pid=intval($_SESSION["Patient_id"]); 
      $query = "SELECT t1.*, t2.Doctor_name, t2.Doctor_room ". 
        "FROM Appointment AS t1 INNER JOIN Doctor AS t2 ". 
        "ON t1.Doctor_id=t2.Doctor_id"; 

      //executes query on the database 
      $result = mysql_query ($query) or die ("didn't query"); 

      //this selects the results as rows 
      $num = mysql_num_rows ($result);  

      //if there is only 1 result returned than the data is ok 
      if ($num == 1) 
      { 
       $row = mysql_fetch_array($result); 

       if($row['Appointment_taken'] == 0) 
       { 
        $_SESSION['Appointment_date'] = $row['Appointment_date']; 
        $_SESSION['Appointment_time'] = $row['Appointment_time']; 
       } 

       $_SESSION['Doctor_name']  = $row['Doctor_name']; 
       $_SESSION['Doctor_room']  = $row['Doctor_room']; 
      } 
     } 

     ?>

正如其他人建議你，你應該開始學習PDO與mysqli的

來源

2013-04-01 05:00:24 alwaysLearn

從數據庫中刪除數據

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