Leetcode Problem 1919. Leetcodify Similar Friends

1919. Leetcodify Similar Friends

Leetcode Solutions

Finding Similar Friends Based on Shared Music Interests

Perform a self-join on the Listens table to find all pairs of users who listened to the same song on the same day.
Ensure that the pairs are distinct and that the first user ID is less than the second user ID to avoid duplicates and adhere to the problem's constraints.
Group the results by user pair and day.
Use the HAVING clause to filter groups that have listened to at least three distinct songs.
Join the filtered results with the Friendship table to ensure the user pairs are friends.
Select the distinct user pairs from the final joined table as the output.

erDiagram
    Listens {
        int user_id
        int song_id
        date day
    }
    Friendship {
        int user1_id
        int user2_id
    }
    Listens }|--|| Friendship : ""

Aggregating Common Songs Listened by Friends on the Same Day

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Leetcode Problem 1919. Leetcodify Similar Friends

Leetcode Solutions

Finding Similar Friends Based on Shared Music Interests

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Aggregating Common Songs Listened by Friends on the Same Day

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