EasyNo. 1075
Project Employees I — LeetCode 1075 Python Solution
- Topics
- Database
- Reading time
- 2 min
- Source
- leetcode.com
Table schema
Table: Project +-------------+---------+ | Column Name | Type | +-------------+---------+ | project_id | int | | employee_id | int | +-------------+---------+ (project_id, employee_id) is the primary key of this table. employee_id is a foreign key to Employee table.Example
+-------------+---------+
| Column Name | Type |
+-------------+---------+
| project_id | int |
| employee_id | int |
+-------------+---------+
(project_id, employee_id) is the primary key of this table.
employee_id is a foreign key to Employee table.
Each row of this table indicates that the employee with employee_id is working on the project with project_id.Python solution
import duckdb
import pandas as pd
def solution(project: pd.DataFrame, employee: pd.DataFrame) -> pd.DataFrame:
con = duckdb.connect()
con.register("Project", project)
con.register("Employee", employee)
return con.execute("""SELECT project_id, ROUND(AVG(experience_years), 2) AS average_years
FROM
Project
JOIN Employee USING (employee_id)
GROUP BY 1;""").df()Complexity
- Time
- O(n log n)(typical)
- Space · auxiliary
- O(n)
Related problems
| No. | Problem | Difficulty |
|---|---|---|
| 1068 | Product Sales Analysis I | Easy |
| 0175 | Combine Two Tables | Easy |
| 0176 | Second Highest Salary | Medium |
| 0177 | Nth Highest Salary | Medium |
| 0178 | Rank Scores | Medium |
| 0180 | Consecutive Numbers | Medium |
Frequently asked questions
- How hard is LeetCode 1075. Project Employees I?
LeetCode 1075. Project Employees I is rated Easy on LeetCode.
- What topics does LeetCode 1075. Project Employees I cover?
LeetCode 1075. Project Employees I is tagged Database on LeetCode.