SELECT date_of_latest_revision FROM Catalogs GROUP BY date_of_latest_revision HAVING count(*)  >  1
On which days more than one revisions were made on catalogs.
SELECT date_of_latest_revision FROM Catalogs GROUP BY date_of_latest_revision HAVING count ( * ) > 1
select date_of_latest_revision from catalogs group by date_of_latest_revision having count ( * ) > value
On which days more than one revisions were made on catalogs .