I have a database that contains 13,772 records and each record contains 34 fields. The database is used for historical research purposes. As I am constantly changing the content in one or more fields I would like to be able to have a field that would show the date of any changes that are made to any of the fields in any given record. Additionally I would like to be able to run a query, lets say every six months and extract all the updated records. Any offers of advice on how to proceed would be very much appreciated. Thanks in advance.