Question

我有一张这样的桌子：

reqnumber empname
   1       name1
   2       name2

请注意，reqnumber是主键，它会为每个插入自动递增，我想在其上添加前缀，然后添加数字。这是一个示例：

reqnumber empname
  TS1      name1
  TS2      name2

我不太确定从哪里开始，因为我的插入代码上没有reqnumber，我已经阅读并尝试了一些方法，但是我无法真正将其合并到我的插入代码中。另外，我使用的是动态表单，这会使我的插入代码更加复杂。

这是我的插入代码：

$connect = mysqli_connect("localhost", "root", "", "pcrequest");
if(isset($_POST["reqname"]))
{
 $length = 3;
 $trackingcode = 'TS-' . substr(str_shuffle("0123456789"), 0, $length);
 $req_date = $_POST["req_date"];
 $reqname = $_POST["reqname"];
 $date = $_POST["date"];
 $empname = $_POST["empname"];
 $position = $_POST["position"];
 $account = $_POST["account"];
 $platform = $_POST["platform"];
 $processor = $_POST["processor"];
 $ram = $_POST["ram"];
 $monitor = $_POST["monitor"];
 $phone = $_POST["phone"];
 $phonetype = $_POST["phonetype"];
 $headset = $_POST["headset"];
 $req_table = $_POST["req_table"];
 $req_chair = $_POST["req_chair"];
 $approval = $_POST["approval"];
 $status = $_POST["status"];
 $query = '';
 

  for($count = 0; $count<count($reqname); $count++)
  {
  $req_date_clean = mysqli_real_escape_string($connect, $req_date[$count]);
  $reqname_clean = mysqli_real_escape_string($connect, $reqname[$count]);
  $date_clean = mysqli_real_escape_string($connect, $date[$count]);
  $empname_clean = mysqli_real_escape_string($connect, $empname[$count]);
  $position_clean = mysqli_real_escape_string($connect, $position[$count]);
  $account_clean = mysqli_real_escape_string($connect, $account[$count]);
  $platform_clean = mysqli_real_escape_string($connect, $platform[$count]);
  $processor_clean = mysqli_real_escape_string($connect, $processor[$count]);
  $ram_clean = mysqli_real_escape_string($connect, $ram[$count]);
  $monitor_clean = mysqli_real_escape_string($connect, $monitor[$count]);
  $phone_clean = mysqli_real_escape_string($connect, $phone[$count]);
  $phonetype_clean = mysqli_real_escape_string($connect, $phonetype[$count]);
  $headset_clean = mysqli_real_escape_string($connect, $headset[$count]);
  $req_table_clean = mysqli_real_escape_string($connect, $req_table[$count]);
  $req_chair_clean = mysqli_real_escape_string($connect, $req_chair[$count]);
  $approval_clean = mysqli_real_escape_string($connect, $approval[$count]);
  $status_clean = mysqli_real_escape_string($connect, $status[$count]);
  if($req_date_clean != '' && $reqname_clean != '' && $date_clean != '' && $empname_clean != '' && $position_clean != '' && $account_clean != '' && $platform_clean != '' && $processor_clean != '' && $ram_clean != '' && $monitor_clean != '' && $phone_clean != '' && $phonetype_clean != '' && $headset_clean != '' && $req_table_clean != '' && $req_chair_clean != '' && $approval_clean != '' && $status_clean != '')
  {
   $query .= '
   INSERT INTO request(trackingcode, req_date, reqname, date, empname, position, account, platform, processor, ram, monitor, phone, phonetype, headset, req_table, req_chair, approval, status) 
   VALUES("'.$trackingcode.'", "'.$req_date_clean.'", "'.$reqname_clean.'", "'.$date_clean.'", "'.$empname_clean.'", "'.$position_clean.'", "'.$account_clean.'", "'.$platform_clean.'", "'.$processor_clean.'", "'.$ram_clean.'", "'.$monitor_clean.'", "'.$phone_clean.'", "'.$phonetype_clean.'", "'.$headset_clean.'", "'.$req_table_clean.'", "'.$req_chair_clean.'", "'.$approval_clean.'", "'.$status_clean.'"); 
   ';
  }

Answer 1

由于您的列使用AUTO_INCREMENT，因此必须为整数或浮点类型（任何大小）。 https://dev.mysql.com/doc/refman/5.7/en/create-table.html

某些属性并不适用于所有数据类型。 AUTO_INCREMENT适用仅适用于整数和浮点类型。

因此您无法为其分配字符串值。您可以添加一个新列，并使用触发器来填充它，以生成并插入所需的值（内容将在插入时生成）。或者您可以创建一个视图来访问它（每次查询时都会对内容进行评估）。

插入时在主键上添加前缀

1 个答案: