For a over view of DB statistics please read
ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/tsqlref9/html/919158f2-38d0-4f68-82ab-e1633bd0d308.htm
To determine the statistics for a particular table or view use:
To display a report on the indexes of an object, execute sp_helpindex and specify the table or view name.