Question

我想运行一个提取P_no的sql select查询，然后为它运行更新查询。它总是只更新1个值。

$d=date('Y-m-d');
$qu="select P_no from date_summary where `Nextcall_1`='$d' or 
`Nextcall_2`='$d' or `Nextcall_3`='$d' or `Nextcall_4`='$d' 
or`Nextcall_5`='$d' or `Nextcall_6`='$d' or `Nextcall_7`='$d' or 
`Nextcall_8`='$d' or `Nextcall_9`='$d' or `Nextcall_10`='$d' or 
`Nextcall_11`='$d'";
 $res=mysqli_query($con,$qu);
if($res && mysqli_num_rows($res)>0)
 {
   while($row=mysqli_fetch_assoc($res))
   {
      $p1=$row["P_no"]; 
       $qu="update notification_status set Noti_status='Unchecked' where 
       P_no=$p1";
       $res=mysqli_query($con,$qu);
  }
}

Answer 1

您可以使用in运算符：

UPDATE notification_status
SET    noti_status='Unchecked'
WHERE  p_no IN (SELECT p_no FROM date_summary WHERE /* etc... */)

如何针对先前查询

1 个答案: