- It is in first normal form
- All non-key attributes are fully functional dependent on the primary key
Hence, in a 2NF table, all non-key attributes cannot be dependent on a subset of the primary key. Note that if the primary key is not a composite key, all non-key attributes are always fully functional dependent on the primary key.
A table that is in 1st normal form and contains only a single key as the primary key is automatically in 2nd normal form.