- Add the Missing Values
- Analyze Organization Hierarchy [Extra Difficult]
- Average Salary: Departments VS Company
- Child - Parent - Grandparent Hierarchy
- Clocked Hours
- Company Structure [Extra Difficult]
- Consecutive User Logins [Difficult]
- Count Mutual Friends [Difficult]
- Department Top 3 Salary
- Employees Check-in Details
- Employees Hiring [Difficult]
- Employees Log [Extra Difficult]
- Final Destination
- Find Cumulative Salary of an Employee
- Highest-Grossing Items
- Increasing Sales Revenue
- Last Person to Fit in the Bus
- Lift Overloaded
- Manager with at least 5 direct reportees
- Mismatched IDs
- Missing Invoices
- Odd and Even Measurements
- Onboarded Cities
- Popular Posts
- Qualifying Criteria
- Student Details
- Travel Analytics
- Vacations Record [Difficult]