Do you track date/time of the last record update for all tables?
Updated
The RecordLastUpdated (or UpdatedDate) field is maintained for all tables where the values change slowly over time (e.g. PropertyFeature).
Note: Some tables contain data that is reloaded from scratch each time and don't have RecordLastUpdated.
Added
Some tables maintain a separate CreateDate field to track when records were first added to a table