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Joining Data with SQL

Here you can access every table used in the course. To access each table, you will need to specify the world schema in your queries (e.g., world.countries for the countries table, and world.languages for the languages table).

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.).

Take Notes

Add notes about the concepts you've learned and SQL cells with queries you want to keep.

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DataFrameas
world_info
variable
-- Add your own queries here
SELECT *
FROM world.languages 
LIMIT 5
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DataFrameas
df
variable
-- Select the names, continents, and areas of countries
-- Note that the query may take a long time to run if you remove the LIMIT statement
SELECT countries.name AS country_name,
        continents.name AS continent_name,
        area
FROM countries
  INNER JOIN regions USING(region_id)
  INNER JOIN continents USING(continent_id)
ORDER BY country_name
LIMIT 5