https://github.com/mahmoudwal27/sql-data-analysis

This project demonstrates SQL operations for managing student enrollments, including creating tables, inserting data, updating records, and running queries to analyze student and course information. It showcases skills in data manipulation, aggregation, and advanced query formulation.
https://github.com/mahmoudwal27/sql-data-analysis

analysis data-analysis sql sql-data-analysis sql-queries

Last synced: 3 months ago
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This project demonstrates SQL operations for managing student enrollments, including creating tables, inserting data, updating records, and running queries to analyze student and course information. It showcases skills in data manipulation, aggregation, and advanced query formulation.

• Host: GitHub
• URL: https://github.com/mahmoudwal27/sql-data-analysis
• Owner: mahmoudwal27
• Created: 2025-02-17T14:23:38.000Z (3 months ago)
• Default Branch: main
• Last Pushed: 2025-02-25T17:13:19.000Z (3 months ago)
• Last Synced: 2025-02-25T18:25:24.009Z (3 months ago)
• Topics: analysis, data-analysis, sql, sql-data-analysis, sql-queries
• Homepage:
• Size: 9.77 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# 🎓 Student Enrollment Database  

This **SQL project** designs and manages a **student enrollment system**, handling student records, course details, and enrollment history. It includes **data insertion, updates, deletions, queries, and analytics** to extract valuable insights from academic data.  

## 📌 Project Workflow  

### 1️⃣ Database & Tables Creation  

- **Students** – Stores student details (ID, name, DOB, email, enrollment date).  

- **Courses** – Stores course details (ID, name, department, credits).  

- **Enrollments** – Tracks student-course enrollments, grades, and semesters.  

### 2️⃣ Data Insertion  

- Populated tables with sample student, course, and enrollment data.  

### 3️⃣ Data Manipulation  

- **Updating Student Info** – Modified email records.  

- **Deleting Records** – Removed students based on conditions.  

### 4️⃣ Data Retrieval & Analysis  

- **Student Queries**  

  - Retrieve student details, count, and enrollment dates.  

  - List students with no enrollments.  

  - Sort students by enrollment date.  

- **Course Queries**  

  - Fetch course details, total credits per department.  

  - Find courses with no enrollments.  

  - Get the most popular courses based on enrollments.  

- **Enrollment & Performance Queries**  

  - Join student and course tables to get detailed enrollment info.  

  - Calculate GPA based on grading scale.  

  - Find top-performing students and courses.  

  - Analyze semester-wise enrollments.  

## 🛠 Tools & Technologies Used  

- **Microsoft SQL Server**  

- **SQL (DDL, DML, Joins, Aggregations, CTEs, Views)**  

## 📊 Key Insights  

✅ Which students have the highest number of enrollments?  

✅ What is the average GPA for each course?  

✅ Which department offers the most credit hours?  

✅ What are the most enrolled courses per semester?  

This project **efficiently manages academic records** and provides **actionable insights** for student and course performance! 🚀