Question

this is my query

$db2=mysql_connect("localhost","root","");
    mysql_select_db("my_requests",$db2);

    $query=mysql_query("SELECT * FROM details INNER JOIN product ON details.user_id = product.user_id"); // find the city
    $row=mysql_fetch_array($query);// save record

        $id=$row['user_id'];
        echo "$id";


        $query1=mysql_query("DELETE * FROM details WHERE details.user_id=$id");
        $query2=mysql_query("DELETE * FROM product WHERE product.user_id=$id");

Here i have two tables products and detail ,user id is the primary key in details and made foreign key in product.

lets suppose i have two entries in the database with user_id =12 and another with user_id=11
1. when i take the innerjoin of two tables and try to display the user_id’s it shows only one user_id 12
2. when i am trying to delete data using the user_id,it does not delete the data from the table.

sorry for the bad english

Answer 1

In your SELECT query, you have to specify tha table to get the * like details.* or products.*, becasue you’re joinning two tables. In your case, it’s the same result.

You also need to place $row=mysql_fetch_array($query); in a loop, to fetch each rows, then, you have a bad DELETE syntax :

while($row=mysql_fetch_array($query)) {
    $id=$row['user_id'];
    echo "$id";

    $query1=mysql_query("DELETE FROM details WHERE details.user_id=$id");
    $query2=mysql_query("DELETE FROM product WHERE product.user_id=$id");


}