Leetcode Problem 1549. The Most Recent Orders for Each Product

1549. The Most Recent Orders for Each Product

Leetcode Solutions

Using MAX() to Find the Most Recent Order

Use the MAX() function within a subquery to select the latest order_date for each product_id from the Orders table.
Perform a JOIN operation between the Products table and the Orders table on the product_id column to get all the necessary details for the final output.
Join the result of step 2 with the subquery from step 1 on both product_id and order_date to filter only the most recent orders for each product.
Select the distinct records from the joined tables to avoid duplicates.
Order the final result by product_name, product_id, and order_id in ascending order to meet the output requirements.

erDiagram
    Customers {
        int customer_id
        varchar name
    }
    Orders {
        int order_id
        date order_date
        int customer_id
        int product_id
    }
    Products {
        int product_id
        varchar product_name
        int price
    }
    Customers ||--o{ Orders : ""
    Products ||--o{ Orders : ""

Using RANK() to Find the Most Recent Order

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Leetcode Problem 1549. The Most Recent Orders for Each Product

Leetcode Solutions

Using MAX() to Find the Most Recent Order

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Query Steps

Code Implementation

Using RANK() to Find the Most Recent Order

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