Question

What is the complete SQL query to select city, urbanarea_pop, country, indep_year, language, and percent from the tables languages, countries, and cities, and order the result by city and language?

Answer 1

The SQL query joins three tables: 'cities', 'countries', and 'languages', and selects specified fields, ordering the results by 'city' and 'language'. It includes JOIN clauses to relate tables through 'country_code' and an ORDER BY clause for sorting.

Step-by-step explanation:

To write an SQL query that selects fields from multiple tables and orders the results, you will need to use a SELECT statement with the appropriate field names, include JOIN clauses to define how the tables are related, and an ORDER BY clause to sort the results. Assuming that the 'cities' table is related to the 'countries' table through a country code, and the 'countries' table is related to the 'languages' table through the same country code, the query might look something like this:

SELECT c.city, c.urbanarea_pop, co.country, co.indep_year, l.language, l.percent
FROM cities AS c
JOIN countries AS co ON c.country_code = co.country_code
JOIN languages AS l ON co.country_code = l.country_code
ORDER BY c.city, l.language;

This query selects the desired fields from the 'cities' alias 'c', 'countries' alias 'co', and 'languages' alias 'l'. It joins the three tables on the common 'country_code' column and sorts the output by city and language.