(SELECT COUNT(id) FROM ttrss_feed_categories AS c2
WHERE c2.parent_cat = ttrss_feed_categories.id) AS num_children
FROM ttrss_feed_categories, ttrss_cat_counters_cache
WHERE ttrss_cat_counters_cache.feed_id = id AND
ttrss_cat_counters_cache.owner_uid = ttrss_feed_categories.owner_uid AND
(SELECT COUNT(id) FROM ttrss_feed_categories AS c2
WHERE c2.parent_cat = ttrss_feed_categories.id) AS num_children
FROM ttrss_feed_categories, ttrss_cat_counters_cache
WHERE ttrss_cat_counters_cache.feed_id = id AND
ttrss_cat_counters_cache.owner_uid = ttrss_feed_categories.owner_uid AND