📝 Assignment: Database Indexing and Optimization

🎯 Learning Objectives

• ➕ Add indexes to tables and analyze their impact on query performance.
• 👤 Create user accounts and assign roles in a sample database.
• 🔒 Explore database security measures and access control for data protection.
• 💻 Practice advanced SQL queries based on real-world scenarios.

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📋 What You'll Need

• 💻 A computer with internet access.
• ✍️ A code editor (e.g., Visual Studio Code).
• 🖥️ MySQL Workbench or another SQL database environment.

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📝 Submission Instructions

📂 Write all your SQL queries in the answers.sql file.
✍️ Answer each question concisely and make sure your queries are clear and correct.
🗣️ Structure your responses clearly, and use comments if necessary to explain your approach.

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📚 Assignment Questions

Question 1 🗑️

Write an SQL query to drop an index named IdxPhone from customers table.

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Question 2 👤

Write an SQL query to create a user named bob with the password 'S$cu3r3!' , restricted to the localhost hostname.

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Question 3 🔑

Write an SQL query to grant the INSERT privilege to the user bob on the salesDB database.

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Question 4 🔐

Write an SQL query to change the password for the user bob to 'P$55!23'

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Good luck 🚀

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❗ Submission Note

Date completed: 17 September 2025
Status: ❌ Late submission (Deadline: 03 September 2025, Wednesday)

This project was submitted after the official deadline and will not be reviewed.
It is intended exclusively for learning and demonstration purposes.