About: http://webisa.webdatacommons.org/11623998

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	My point is: if you use same size columns, there will be no significant difference in order to join, filter, insert, select, update or delete if the primary key is a number or varchar2.
http://www.w3.org/ns/prov#wasQuotedFrom	dbasupport.com