Computer scienceFundamentalsSQL and DatabasesBasics SQLRetrieving Data

Types of JOINs

Using data from two tables

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Suppose you have two tables, a table with countries and a table with languages, each of which has two columns: [country_id, country_name] and [country_id, language]. Why will the following query result in an error?

SELECT c.country_name AS country,
       l.language AS language
FROM countries AS c 
INNER JOIN languages AS l;

Select one option from the list

JOIN queries shouldn't be followed by a semi-colon.

INNER JOIN requires a specification of the key field (or fields) in each table on the basis of which the tables would be joined together.

There are multiple languages spoken in many countries.

There is a different number of rows in each table.

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