This repository contains practice SQL queries organized by topic. Useful for mastering database concepts and preparing for technical interviews.

• Basic SELECT queries
• Joins (INNER, LEFT)
• Aggregations & GROUP BY
• Subqueries (nested, correlated)

These queries are written for a fictional College Management database.

You can run them on:

• MySQL
• PostgreSQL
• SQLite (with minor syntax changes)

• students(id, name, dob, email, course_id)
• courses(id, course_name)
• results(id, student_id, subject_id, marks)