Question

SELECT *
FROM cities
INNER JOIN countries
ON cities.country_code = countries.code;

Answer 1

The question relates to database operations and involves using an INNER JOIN in SQL to combine records from two related tables based on a matching condition.

Step-by-step explanation:

The given query is related to the subject of Computers and Technology, specifically within the subset of databases. The SQL (Structured Query Language) command presented aims to retrieve records from two database tables - cities and countries. This is achieved through the use of the INNER JOIN operation, which combines rows from both tables where the condition specified by the ON clause matches, in this case, using the country_code field from the cities table and the code field from the countries table.

The INNER JOIN is a commonly used SQL join that returns only matching records from the participating tables. If a row in either table does not have a matching counterpart, it will not appear in the result set. This SQL operation is fundamental for database users who need to extract comprehensive data from related tables in a relational database.