Refactored three_nf_synthesis for accurate 3NF decomposition

📅 2023-04-20 — Session: Refactored three_nf_synthesis for accurate 3NF decomposition

🕒 20:30–20:40
🏷️ Labels: 3NF, Functional Dependencies, Python, Sqlite, Data Processing
📂 Project: Dev
⭐ Priority: MEDIUM

Session Goal

The session aimed to fix the three_nf_synthesis function to ensure accurate 3NF decomposition by addressing column name mismatches.

Key Activities

• Identified the issue with incorrect column names in the three_nf_synthesis function due to mismatched DataFrame and database column names.
• Proposed a solution to modify the function to accept DataFrame column names as an argument.
• Addressed the problem of an undefined variable F in the coding context, suggesting its definition before invoking the function.
• Explained functional dependencies in database relations and their importance in 3NF decomposition.
• Discussed methods for inferring functional dependencies using Armstrong’s axioms, including a Python implementation.
• Demonstrated the use of combinations from Python’s itertools module to generate column pairs.
• Provided a guide for using SQLite Studio for database management.

Achievements

• Clarified the approach to fix the three_nf_synthesis function by accepting DataFrame column names.
• Enhanced understanding of functional dependencies and their role in database normalization.
• Provided a practical guide for using SQLite Studio for SQL operations.

Pending Tasks

• Implement the proposed changes to the three_nf_synthesis function.
• Define the variable F in the coding context before function execution.