Query Is So Slow

Introduction

In this project, you will learn how to optimize database queries to improve performance in the LabEx system. The LabEx system is a platform that manages user study records, courses, and other related data. The project focuses on optimizing three frequently used queries in the system.

👀 Preview

🎯 Tasks

In this project, you will learn:

• How to add a compound index on the user and study_time fields of the usercourse table to improve query performance.
• How to optimize the first query to find the study time of a specific user for a specific course.
• How to optimize the second query to sort the study records of a user's courses by study time.
• How to optimize the third query to retrieve all the courses that a user has studied.

🏆 Achievements

After completing this project, you will be able to:

• Understand the importance of indexing in database optimization.
• Implement compound indexes to improve the performance of complex queries.
• Analyze query execution plans to identify performance bottlenecks.
• Optimize database queries by leveraging appropriate indexes.
• Apply your knowledge to improve the performance of real-world database applications.