Several paradigms of database

1NF: All fields in the first normal form table contain only single values.

2NF: Each non-key field in the second Paradigm table is determined by the entire primary key and cannot be determined by a part of the primary key itself

3NF: Non-key fields that can determine other non-key fields do not exist in the third Paradigm table

BCNF Paradigm: Each determination factor is a key

4NF Fourth normal form: In the primary key table, a part of the key can determine multiple values for at most one other field.

Several paradigms of database