Data Engineering Interview Questions: SQL and Databases III

Building the Relationship Between Books and Readers for a Library Warehouse

Rows of books on library shelves, representing the relationship between books and readers.

In a library warehouse, managing the relationship between books and readers is important for tracking which books are borrowed, who borrowed them, and when they are due for return. Below is a designed schema that models this relationship using SQL tables and markdown tables for clarity.

Database Tables

1. Books Table
Store information about each book in the library.

| Column Name       | Data Type      | Description                        |
|-------------------|----------------|------------------------------------|
| `BookID`          | `INT`          | Primary key, unique identifier     |
| `Title`           | `VARCHAR(255)` | Title of the book                  |
| `ISBN`            | `VARCHAR(20)`  | International Standard Book Number |
| `Publisher`       | `VARCHAR(255)` | Publisher of the book              |
| `PublishedYear`   | `YEAR`         | Year the book was published        |
| `CopiesOwned`     | `INT`          | Total copies the library owns      |
| `CopiesAvailable` | `INT`          | Copies available for borrowing     |