Acho que o banco está correto.
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mysql> use mutillidae
Reading table information for completion of table and column names
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Database changed
mysql> select * from produtos;
+-----------------------+--------------------+-------------+-------------+
| livro | autor | preco_ebook | preco_livro |
+-----------------------+--------------------+-------------+-------------+
| Node.js | Davi Fernandes | 14,85 | 60,4 |
| Scratch | Cecilia Gomes | 24,98 | 54,19 |
| Haskell | Rafael Oliveira | 13,5 | 63,20 |
| Metricas Ageis | Walewska Rocha | 26,78 | 88,59 |
| Angular 2 | Vitor Oliveira | 31,10 | 76,43 |
| Vue.js | Arthur Lima | 27,30 | 79,3 |
| Elixir | Pietro Oliveira | 45,91 | 62,2 |
| PostgreSQL | Davi Lima | 15,59 | 96,47 |
| Algoritmos | Luiza Araujo | 18,41 | 83,9 |
| Big Data | Valentina Martins | 40,37 | 91,82 |
| Scala | Cecilia Almeida | 48,44 | 71,25 |
| Amazon AWS | Gabriela Pereira | 39,46 | 86,75 |