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I would like to copy the meta_value from row to another (in the same table) where the user_id matches.

Each user in the wp_usermeta table has a meta_key/meta_value pair for first_name and a meta_key/meta_value pair for shipping_first_name. I would like to copy the shipping_first_name value to the first_name value where the user_id matches. I would like to update all users in the database at once (e.g., via phpMyAdmin).

How should this MySQL query be written?

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use this code, it may help you

 $users = get_users($args);
      if($users) {
        foreach($users as $user) {
            $user_id = $user->ID;
            $shipping_first_name = get_user_meta($user_id, 'shipping_first_name', true);
                if($shipping_first_name) {
                  update_user_meta( $user_id, 'first_name', $shipping_first_name);  
                }
            }
        }

for $args - refer link https://codex.wordpress.org/Function_Reference/get_users

  • Thanks for your answer. I would like to execute a update query in order to update all users at once. Wouldn't you answer only update the currently logged-in user? Sorry that I was not more detailed with my question. I'll update it to be clearer. – birthnight Apr 21 '18 at 9:36
  • I have updated code, please check if it will help :) – Munish Kumar Apr 21 '18 at 9:45
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    I used 'role' => 'Customer' for the $args and it worked perfectly. Thanks so much for your help! :) – birthnight Apr 21 '18 at 9:54
  • Sounds Great it is working fine for you. Cheers :) – Munish Kumar Apr 21 '18 at 9:59

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