Php Mysql使用Id从2个表中删除

Question

In my admin dashboard I created a page that show information from 2 tables using a foreign key Id_clt, now I created the delete query but it didn't work Please correct me if I did something wrong, Thanks.

 $conn = mysqli_connect("localhost", "root", "", "vm");
    // DELETE QUERY
    if(isset($_GET['id'])){

        $de=$_GET['id'];    
        $sql_de="DELETE FROM clt_t1,t2 INNER JOIN t2.Id_clt ON clt_t1.Id_clt=t2.Id_clt WHERE Id_clt=$de ";

        $rd=mysqli_query($conn,$sql_de);

        if($rd){
            header("refresh:1; url=welcomeadmin.php");
        }
        else{
            mysqli_error($conn);
            echo "error";
        }

    }

admin.php page:

 <form method="GET" action="deletecomm.php">
    ..
    <td><a href="javascript:delete_data(<?php echo $data['Id_clt'];   ?>)">X</a></td>
    ..
    </form>

Answer 1

The syntax of DELETE ... FROM ... JOIN in MySQL is not quite that.

Instead of

DELETE FROM clt_t1,t2  
INNER JOIN t2.Id_clt ON clt_t1.Id_clt=t2.Id_clt 
WHERE Id_clt=:de 

You should use

DELETE clt_t1
FROM clt_t1
INNER JOIN t2 ON clt_t1.Id_clt=t2.Id_clt 
WHERE clt_t1.Id_clt=:de

And avoid direct variable interpolation by the way.

Answer 2

Thanks to everyone who tried to help me & gave me advice I FOUND THE RIGHT SOLUTION:

$sql_de="
DELETE t2 
FROM t2
LEFT JOIN clt_t1 ON clt_t1.Id_clt=t2.Id_clt 
WHERE clt_t1.Id_clt='".$de."'
";