$result = db_query("SELECT SUM(value) AS sv
FROM ttrss_counters_cache, ttrss_feeds
WHERE id = feed_id AND $cat_qpart AND
+ ttrss_counters_cache.owner_uid = $owner_uid AND
ttrss_feeds.owner_uid = '$owner_uid'");
$unread = (int) db_fetch_result($result, 0, "sv");