About: http://webisa.webdatacommons.org/69973443

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	(1) if they are not in the same schema you will not find the stats in user_tables; (2) The OP never specified they only want a rough estimate based on statistics, nor did they mention performance was an issue.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com