SUM and COUNT Quiz

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BBC QUIZ <quiz shuffle=none display=simple> {Select the statement that shows the sum of population of all countries in 'Europe' |type="()"} - SELECT name, population FROM bbc WHERE region = 'Europe' - SELECT population FROM bbc WHERE region = 'Europe' SUM BY region + SELECT SUM(population) FROM bbc WHERE region = 'Europe' - SELECT SUM(population FROM bbc WHERE region = 'Europe') - SUM population FROM bbc WHERE region = 'Europe'

{Select the statement that shows the number of countries with population smaller than 150000 |type="()"} + SELECT COUNT(name) FROM bbc WHERE population < 150000 - SELECT COUNT(population < 150000) FROM bbc - SELECT name FROM bbc WHERE population < 150000 - SELECT population AS COUNT FROM bbc WHERE population < 150000 - SELECT SUM() FROM bbc WHERE population < 150000

{Select the full set of SQL aggregate functions |type="()"} - AVG(), COUNT(), FIRST(), LAST(), SUM() - AVG(), COUNT(), MAX(), MEDIAN(), MIN(), ROUND(), SUM() + AVG(), COUNT(), FIRST(), LAST(), MAX(), MIN(), SUM() - AVG(), COUNT(), MAX(), MIN(), SUM() - COUNT(), SUM()

{Select the statement that shows the average population of 'Poland', 'Germany' and 'Denmark' |type="()"} - SELECT AVG(population) FROM bbc WHERE name = ('Poland', 'Germany', 'Denmark') + SELECT AVG(population) FROM bbc WHERE name IN ('Poland', 'Germany', 'Denmark') - SELECT AVG(population) FROM bbc WHERE name LIKE ('Poland', 'Germany', 'Denmark') - SELECT AVG(population) FROM bbc WHERE name LIKE (Poland, Germany, Denmark) - SELECT population FROM bbc WHERE name IN ('Poland', 'Germany', 'Denmark')

{Select the statement that shows the name and population density of the country with the largest population |type="()"} - SELECT name, density AS population/area FROM bbc WHERE population = MAX(population) - SELECT name, density AS population/area FROM bbc WHERE population = (SELECT MAX(population) FROM bbc) - SELECT name, MAX (population) FROM bbc WHERE population / (SELECT area FROM bbc) + SELECT name, population/area AS density FROM bbc WHERE population = (SELECT MAX(population) FROM bbc) - SELECT name, population/area AS density FROM bbc WHERE population > (SELECT MAX(population) FROM bbc)

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