Determining additions, deletions and updates to database tables

A method, system and computer program product for determining changes to database tables. In an embodiment, the method comprises loading a first group of records in a first time period in a database; loading a second group of records in a second time period in the database; selecting one or more of the records in the database; and for each of the selected records, determining whether it was loaded into the database during the first time period or the second time period, and providing the each record with a specified designation based on the time period during which the each record was loaded into the database. In an embodiment, identified times when the records were loaded in the database are used to determine the time period during which the each record was loaded in the database.