Quoting Lewis_Prothero:

Quote:
And altering the original data only ever results in one thing: An incorrect database.

This is totally wrong. A database works with database functions (in this case sorting, searching, filtering and linking). But, to work correctly, those functions need formatted data : one "object"= one, and only one, data. I never saw a database (except here) where data for the same "object" can change depending on the source, so that no function can work correctly. We have not a database, we have a collection of useless inconsistent data.