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PostgreSQL Summary Stats and Window Functions
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  • PostgreSQL Summary Stats and Window Functions

    Here you can access the summer_medals table used in the course. To access the table, you will need to specify the medals schema in your queries (e.g., medals.summer_medals).

    Note: When using sample integrations such as those that contain course data, you have read-only access. You can run queries, but cannot make any changes such as adding, deleting, or modifying the data (e.g., creating tables, views, etc.).

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    Unknown integration
    DataFrameavailable as
    -- Add your own queries here
    SELECT *
    FROM medals.summer_medals
    LIMIT 5
    This query is taking long to finish...Consider adding a LIMIT clause or switching to Query mode to preview the result.

    Explore Datasets

    Use the summer_medals table to explore the data and practice your skills!

    • Select the athlete, event, and year from the summer_medals table.
      • Add another column, previous_winner, which contains the previous winner of the same event.
      • Filter your results for gold medalists.
    • Return the year, total number of medalists per year, and running total number of medalists in the history of the Summer Olympics.
      • Order your results by year in ascending order.
    • Return the country, year, and the number of gold medals earned.
      • Limit your results to the years 2004, 2008, and 2012.
      • Each country should have a subtotal of all gold medals earned across the three years.