task Self joins · medium
Earning more than the manager
Return employee, employee_salary, manager and manager_salary for employees who earn strictly more than their direct manager.
what to return
- Columns
employeeemployee_salarymanagermanager_salaryin this order- Rows
- 2 rows · any order
- Watch for
- Equal salaries don't count.
- Employees without a manager can't qualify.
- Skill
- Join a table to itself through a parent key. Refresher: Self-joins & referral relationships →
expected result
Your query should return exactly these columns and values. Run it and compare.
expected result2 rows · any order
| employee | employee_salary | manager | manager_salary |
|---|---|---|---|
| Elif Kaya | 145000 | Dev Patel | 140000 |
| Hugo Brandt | 185000 | Bruno Costa | 180000 |
all 2 rows
data you can query
Sample rows from each table. Each column shows its type underneath; → marks a link to another table.
employees7 columns · 20 rows
| idinteger · key | nametext | manager_idinteger → employees | department_idinteger → departments | titletext | salaryreal | hired_attext |
|---|---|---|---|---|---|---|
| 1 | Ada Moreno | NULL | NULL | CEO | 250000 | 2019-03-01 |
| 2 | Bruno Costa | 1 | 1 | VP Engineering | 180000 | 2019-06-15 |
| 3 | Carmen Diaz | 1 | 2 | VP Sales | 150000 | 2020-01-10 |
| 4 | Dev Patel | 2 | 1 | Engineering Manager | 140000 | 2020-05-04 |
| 5 | Elif Kaya | 4 | 1 | Senior Engineer | 145000 | 2021-02-01 |
showing 5 of 20 rows
solution.sql
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