Patent ID: 7054891

Claim:
A method executed by a computer system for comprising database data, comprising: receiving a first determination by a user of first and second portions of database data, the first determination of the portions being specifiable by the user; selecting the user-determined first portion of database data at a first time, the first portion comprising less than all the database data; generating a first set of cyclical redundancy check values based directly on the first portion of database data; selecting the user-determined second portion of database data at a second time, the second portion comprising less than all the database data; generating second set of cyclical redundancy check values based directly on the second portion of database data; comparing each cyclical redundancy check value in the first set of cyclical redundancy check values with a corresponding cyclical redundancy check value in the second set of cyclical redundancy check values; receiving a second determination by a user of a first subset of the first portion and a second subset of the second portion of database data, the second determination of the subsets being specifiable by the user; selecting the first subset of the first portion of database data; selecting the second subset of the second portion of database data; and displaying to the user the selected first and second subsets of database data along with differences between corresponding cyclical redundancy check values in the first and second sets.