使用Wordpress Meta值进行MySQL查询

Question

I have a few wordpress posts with multiple meta values...

Im trying to write a query that will find all posts with X values...

$customkey1 = 'Type of Vehicle';
$customvalue1 = $_POST['OPT1']; 

$customkey1 = 'Network'; 
$customvalue1 = $_POST['OPT2']; 

$my_posts = $wpdb->get_results("
    SELECT * FROM $wpdb->posts, $wpdb->postmeta 
    WHERE ID = $wpdb->postmeta.post_id 
    AND meta_key = '$customkey' 
    AND meta_value = '$customvalue' 
    AND meta_key = '$customkey1' 
    AND meta_value = '$customvalue1' 
    AND $wpdb->posts.post_status = 'publish' 
    ORDER BY post_date DESC
");

I think where im going wrong is im saying 'WHERE meta_key' equals 1 thing but then im saying if it equals another, I need to see if any of the meta keys are the same, does this make sense?

Thanks

Answer 1

      SELECT * FROM $wpdb->posts as posts, $wpdb->postmeta as postmeta1 , $wpdb->postmeta as postmeta2 (and more....)

    WHERE

    posts.ID = postmeta1.post_id

    posts.ID = postmeta2.post_id

(and more....)

    AND  postmeta1.meta_key = '$customkey' 

    AND  postmeta1.meta_value = '$customvalue' 

    AND postmeta2.meta_key = '$customkey1' 

    AND postmeta2.meta_value = '$customvalue1' 

(and more....)

    AND $wpdb->posts.post_status = 'publish' 

    ORDER BY post_date DESC