Question : WHAT'S THE DIFFERENCE BETWEEN NATURAL KEYS AND surrogate keys

WHAT'S THE DIFFERENCE BETWEEN NATURAL KEYS AND surrogate keys and also various practises of using keys in dimensional model vs normalized (oltp) model and vs OLAP model and various techniques  of denormailizing a normalized model

Answer : WHAT'S THE DIFFERENCE BETWEEN NATURAL KEYS AND surrogate keys

Some examples are here: http://books.google.cz/books?id=wKNfTHRNkLAC&pg=PA211&lpg=PA211&dq=surrogate+key+foxpro&source=bl&ots=_ZbXpRWj2H&sig=aNQb1QrT5pmWmdMOvSiasCAH4wI&hl=cs&ei=V639S-rtHaHCmgP_stDdCQ&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCEQ6AEwAg#v=onepage&q=surrogate%20key%20foxpro&f=false

http://searchsqlserver.techtarget.com/feature/What-are-surrogate-key-values

Also you may read:
http://en.wikipedia.org/wiki/Surrogate_key, http://en.wikipedia.org/wiki/Natural_key
http://www.sqlmag.com/article/data-modeling/surrogate-key-vs-natural-key.aspx
http://decipherinfosys.wordpress.com/2007/02/01/surrogate-keys-vs-natural-keys-for-primary-key/
http://sqlblogcasts.com/blogs/tonyrogerson/archive/2006/05/11/427.aspx