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Leetcode Problem 511. Game Play Analysis I

511. Game Play Analysis I

Leetcode Solutions

Approach: Grouping and Extracting the Minimum

  1. Use the SELECT statement to specify the columns we are interested in: player_id and the minimum event_date.
  2. Use the FROM clause to specify the Activity table as the data source.
  3. Apply the GROUP BY clause to group the results by player_id.
  4. Use the MIN() aggregate function to find the earliest event_date for each group.
  5. Alias the result of the MIN() function as first_login to match the expected output column name.
erDiagram
    Activity {
        int player_id
        int device_id
        date event_date
        int games_played
        player_id --|| event_date : is
    }

Approach: Using Window Functions

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