Which Team Pays Best on Average?
A candidate negotiating an offer with Kestrel Labs has asked a blunt question the recruiter cannot answer off the top of her head: which team pays best? She does not want the biggest single salary — one very senior person can make a modest team look generous. She wants the team on which the typical person does best.
The employee export has one row per person and no per-team summary anywhere, so the answer has to be assembled: ten salaries have to become four typical figures, which are the four things the recruiter can actually compare.
employees — one row per person. salary is the annual figure in whole dollars. department_id is the team the person sits on.
| id | name | department_id | salary | hire_date | manager_id |
|---|---|---|---|---|---|
| 1 | Ava Chen | 1 | 145000 | 2021-03-14 | NULL |
| 2 | Ben Ortiz | 1 | 118000 | 2022-06-01 | 1 |
| 3 | Cara Novak | 1 | 121000 | 2023-01-10 | 1 |
| 4 | Deshawn Lee | 2 | 95000 | 2020-09-23 | NULL |
| 5 | Elin Kask | 2 | 88000 | 2022-11-05 | 4 |
| 6 | Farid Amiri | 3 | 76000 | 2023-04-18 | NULL |
| 7 | Grace Kim | 4 | 132000 | 2021-07-30 | NULL |
| 8 | Hugo Silva | 4 | 110000 | 2023-02-14 | 7 |
| 9 | Ines Duarte | 4 | 104000 | 2023-08-01 | 7 |
| 10 | Jonas Weber | 2 | 91000 | 2021-12-19 | 4 |
The table already exists in the database — there is nothing to create or load.
Task: Write a query returning a single row with two columns, department_id and avg_salary, for the team with the highest average salary, rounded to 2 decimal places. Exactly one row comes back. No two Kestrel teams share an average on this data, so there is no tie to settle.
Example output — shape only, on an invented team and figure.
| department_id | avg_salary |
|---|---|
| 6 | 97250.5 |
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