The database is currently in 2NF with 10 tables Each table has: 1 key attribute 1 non-key attribute To convert from 2NF to 3NF: Any non-key attribute that is transitively dependent on the key is removed into a separate table Since each table already has only 1 non-key attribute, there are no transitive dependencies possible within a table Therefore, no further normalization is needed to achieve 3NF The 10 existing tables satisfy 3NF requirements So if the database has 10 tables in 2NF, with 1 key and 1 non-key column each, then the same 10 tables also represent the 3NF form.

Minimum number of tables required for 3NF = 10

Therefore, the minimum number of tables required to express this database in 3NF is 10.

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