## Authors

AuthorId | Name | BirthDate | Country
--- | --- | --- | ---
1 | John Doe | 1980-01-01 | USA
2 | Jane Smith | 2000-06-15 | UK
3 | Emily Johnson | 1975-02-22 | Canada
4 | Michael Brown | 1990-10-28 | Australia
5 | David Wilson | 1985-11-14 | New Zealand
6 | Alexander White | 1992-04-03 | Germany

## Subjects

SubjectId | Name | Description
--- | --- | ---
1 | Mathematics | The study of numbers, quantities, shapes and spaces.
2 | History | The study of past events and their causes and effects.
3 | Biology | The study of living organisms and life processes.
4 | Physics | The study of matter and energy, and how they interact with one another.
5 | Philosophy | The study of fundamental questions about existence, knowledge, values, reason, mind and language.

## Books

BookId | Title | Literature | Rating | AuthorId | SubjectId
--- | --- | --- | --- | --- | ---
|  |  |  | (→ Authors.AuthorId) | (→ Subjects.SubjectId)
1 | Math Mysteries | Fiction Book | 3.5 | 1 | 1
2 | A History of Mankind | Non-fiction Book | 4.0 | 2 | 2
3 | Life Forms | Fiction Book | 2.5 | 3 | 3
4 | Quantum Mechanics | Non-fiction Book | 3.5 | 4 | 4
5 | Ethical Questions | Fiction Book | 4.0 | 5 | 5
6 | Time Travel Theory | Non-fiction Book | 2.5 | 6 | 6

## Reviews

ReviewId | Rating | Comment | BookId
--- | --- | --- | ---
|  |  | (→ Books.BookId)
1 | 3.5 | Great story! | 1
2 | 4.0 | Very informative. | 2
3 | 2.5 | Not what I expected... | 3
4 | 3.5 | Interesting read. | 4
5 | 4.0 | I learned a lot. | 5
6 | 2.5 | Could have been better. | 6