You are designing a database for a library. You want to track books, authors, and the categories each book belongs to. Which design best follows database design best practices?

hard📝 schema Q15 of 15

SQL - Database Design and Normalization

ASeparate tables for books, authors, and categories with primary keys and foreign keys linking them

BSeparate tables for books and categories only, storing author names as text in books

COne table for books and authors combined, and a separate table for categories

DOne table with columns: book_id, book_title, author_name, category_name

Step-by-Step Solution

Solution:

Step 1: Analyze normalization and relationships
Best practice is to separate entities into tables and link them with keys to avoid duplication.
Step 2: Evaluate each option's design
Separate tables for books, authors, and categories with primary keys and foreign keys linking them uses separate tables with keys, which supports clear organization and data consistency.
Final Answer:
Separate tables for books, authors, and categories with primary keys and foreign keys linking them -> Option A
Quick Check:
Separate tables + keys = best design [OK]

Quick Trick: Use separate tables and keys for related data [OK]

Common Mistakes:

Putting all data in one table causing duplicates
Mixing unrelated data in same table
Storing related entity names as plain text

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You are designing a database for a library. You want to track books, authors, and the categories each book belongs to. Which design best follows database design best practices?

Step 1: Analyze normalization and relationships

Step 2: Evaluate each option's design

Final Answer:

Quick Check:

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