Question

SELECT AS country, region, life_expectancy AS life_exp

FROM countries AS c
LEFT JOIN populations AS p
ON = p.country_code
WHERE year = 2010
ORDER BY life_exp
LIMIT 5;
Explanation: sql automatically sorts query results in descending order, this is how we get the lowest life expectancy?

Answer 1

SQL queries by default sort results in ascending order. Thus, in the context of the query provided, the countries with the lowest life expectancy in 2010 will be shown without additional sorting commands due to the use of the LIMIT 5 clause.

Step-by-step explanation:

The student is inquiring about the life expectancy information that can be retrieved from an SQL database query. The specific SQL query mentioned aims to select countries and regions with their respective life expectancies for the year 2010 and order the results to show the five with the lowest life expectancy.

It is important to clarify that by default, SQL orders query results in ascending order, not descending. Therefore, to obtain the countries with the lowest life expectancy, no additional sorting specification is necessary, since the LIMIT 5 clause will already give you the bottom five based on ascending order. If descending order was desired, an ORDER BY life_exp DESC clause would need to be added.