SQL - Database Design and Normalization
You need to design a database for a library system. Books can have multiple authors, and authors can write multiple books. Which design approach best models this relationship?
You need to design a database for a library system. Books can have multiple authors, and authors can write multiple books. Which design approach best models this relationship?
hard📝 schema Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify relationship type
Books and authors have a many-to-many relationship.Step 2: Choose correct modeling approach
Many-to-many requires a join table linking books and authors with foreign keys.Final Answer:
Create three tables: books, authors, and a join table book_authors with foreign keys -> Option CQuick Check:
Many-to-many modeled with join table [OK]
Quick Trick: Use join tables for many-to-many relationships [OK]
Common Mistakes:
- Adding multiple author columns instead of join table
- Storing multiple authors in one string
- Combining books and authors in one table
Master "Database Design and Normalization" in SQL
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