MediumNo. 1532LeetCode Premium
The Most Recent Three Orders — LeetCode 1532 Python Solution
- Topics
- Database
- Reading time
- 4 min
- Source
- leetcode.com
Table schema
Table: Customers +---------------+---------+ | Column Name | Type | +---------------+---------+ | customer_id | int | | name | varchar | +---------------+---------+ customer_id is the column with unique values for this table. This table contains information about customers.Example
+---------------+---------+
| Column Name | Type |
+---------------+---------+
| customer_id | int |
| name | varchar |
+---------------+---------+
customer_id is the column with unique values for this table.
This table contains information about customers.Python solution
import duckdb
import pandas as pd
def solution(customers: pd.DataFrame, orders: pd.DataFrame) -> pd.DataFrame:
con = duckdb.connect()
con.register("Customers", customers)
con.register("Orders", orders)
return con.execute("""WITH
T AS (
SELECT
*,
ROW_NUMBER() OVER (
PARTITION BY customer_id
ORDER BY order_date DESC
) AS rk
FROM
Orders
JOIN Customers USING (customer_id)
)
SELECT name AS customer_name, customer_id, order_id, order_date
FROM T
WHERE rk <= 3
ORDER BY 1, 2, 4 DESC;""").df()Complexity
- Time
- O(n log n)(typical)
- Space · auxiliary
- O(n)
Related problems
| No. | Problem | Difficulty |
|---|---|---|
| 0175 | Combine Two Tables | Easy |
| 0176 | Second Highest Salary | Medium |
| 0177 | Nth Highest Salary | Medium |
| 0178 | Rank Scores | Medium |
| 0180 | Consecutive Numbers | Medium |
| 0181 | Employees Earning More Than Their Managers | Easy |
Frequently asked questions
- How hard is LeetCode 1532. The Most Recent Three Orders?
LeetCode 1532. The Most Recent Three Orders is rated Medium on LeetCode.
- What topics does LeetCode 1532. The Most Recent Three Orders cover?
LeetCode 1532. The Most Recent Three Orders is tagged Database on LeetCode.
- Is LeetCode 1532. The Most Recent Three Orders a premium problem?
Yes. LeetCode 1532. The Most Recent Three Orders is a LeetCode Premium problem, so the full statement and test cases require a paid LeetCode subscription.