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Exercise

Full join (2)

You'll now investigate a similar exercise to the last one, but this time focused on using a table with more records on the left than the right. You'll work with the languages and countries tables.

Begin with a full join with languages on the left and countries on the right. Appropriate fields have been selected for you again here.

Instructions 1/3
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  • 1
    • Choose records in which countries.name starts with the capital letter 'V' or is NULL.
    • Arrange by countries.name in ascending order to more clearly see the results.
    • 2
      • Repeat the same query as before, using a LEFT JOIN instead of a FULL JOIN. Note what has changed compared to the FULL JOIN result!
    • 3
      • Repeat once more, but use an INNER JOIN instead of a LEFT JOIN. Note what has changed compared to the FULL JOIN and LEFT JOIN results.
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