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100 Real-World SQL Scenarios and Solutions
100 Real-World SQL Scenarios and Solutions
by
Abdus Sattar
Last updated: February 5, 2026
Curriculum
5 Sections
17 Lessons
10 Weeks
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Database Schema
This section provides the complete database schema used throughout all 100 SQL scenarios. Understanding the table structures is essential before attempting the queries.
11
1.1
Employees Table
1.2
Departments Table
1.3
3. Customers Table
1.4
4. Orders Table
1.5
5. Products Table
1.6
5. Products Table
1.7
6. Sales Table
1.8
7. OrderDetails Table
1.9
8. Payments Table
1.10
9. Transactions Table
1.11
10. Bookings Table
Basic Queries (Scenarios 1-20)
5
2.1
Scenario 1: Highest Salary by Department
2.2
Scenario 2: Second Highest Salary
2.3
Scenario 3: Employees with Same Salary
2.4
Scenario 4: First Order by Each Customer
2.5
Scenario 5: Above Average Salary
Intermediate Queries (Scenarios 21-50)
1
3.1
Scenarios (21-25)
Advanced Queries (Scenarios 51-80)
0
Expert-Level Queries (Scenarios 81-100)
0
Instructor
Abdus Sattar
2 Students
4 Courses
Free
Student:
0 Students
Lesson:
17 Lessons
Duration:
10 Weeks
Quiz:
0 Quizzes
Level:
All levels
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