Question

SELECT c.code, c.name, c.region, p.fertility_rate, e.year, e.unemployment_rate

FROM countries AS c
INNER JOIN populations AS p
ON c.code = p.country_code
INNER JOIN economies AS e
ON c.code = e.code
AND p.year = e.year;

Answer 1

The query relates to the field of Computers and Technology, specifically database management, and involves joining tables to extract specific information such as country details, fertility rates, and unemployment rates.

Step-by-step explanation:

The query provided involves using an INNER JOIN across three different tables in a database: countries, populations, and economies. The purpose is to retrieve a unified set of data that includes country codes, names, regions, fertility rates, years, and unemployment rates. This query can be utilized in databases related to geography or social studies, but given the context of the tables and the nature of the SQL command, it falls under the domain of Computers and Technology, specifically within the subject area of database management. The action of joining tables and extracting information is a key task in any data-driven application.

The student's question is college-level as it deals with complexities of database operations which are typically covered in post-secondary education.