About: http://webisa.webdatacommons.org/157479999

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	If I add up all the rows where staff_id=2 and the date is 01/2014 I get a total of 7780.Since your columns other than staff_id and amount are irrelevant, do not select them to keep your query simple.SELECT
http://www.w3.org/ns/prov#wasQuotedFrom	phpfreaks.com