返回結果數量限制

Question

如何限制返回的結果數量？

$images = $wpdb->get_col(" 
    SELECT ID FROM $wpdb->posts 
    WHERE post_type = 'attachment' 
    AND ID in ($meta) 
    ORDER BY menu_order ASC 
"); 

Answer 1

要限制在5行，請使用以下查詢：

$images = $wpdb->get_col(" 
    SELECT ID FROM $wpdb->posts 
    WHERE post_type = 'attachment' 
    AND ID in ($meta) 
    ORDER BY menu_order ASC 
    LIMIT 5 
");