mysql语句:
DELETE FROM wp_postmeta WHERE meta_key = '_thumbnail_id';
PHP代码:
global $wpdb;
$wpdb->query( "
DELETE FROM $wpdb->postmeta
WHERE meta_key = '_thumbnail_id'
" );
mysql语句:
DELETE FROM wp_postmeta WHERE meta_key = '_thumbnail_id';
PHP代码:
global $wpdb;
$wpdb->query( "
DELETE FROM $wpdb->postmeta
WHERE meta_key = '_thumbnail_id'
" );