Difference between revisions of "SUM and COUNT Quiz"
(There was a mistake in the last question. It searchs for regions with area less than 20.000.000, but the correct answer contained South Asia, with 49.437.710. I just changes the value to something lower than 20.000.000) |
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<table style='float:left'><caption>Table-B</caption><tr><td>Africa</td><td>22550927</td></tr><tr><td>Asia-Pacific</td><td>28759578</td></tr><tr><td>Europe</td><td>23866987</td></tr><tr><td>North America</td><td>21660000</td></tr></table> | <table style='float:left'><caption>Table-B</caption><tr><td>Africa</td><td>22550927</td></tr><tr><td>Asia-Pacific</td><td>28759578</td></tr><tr><td>Europe</td><td>23866987</td></tr><tr><td>North America</td><td>21660000</td></tr></table> | ||
<table style='float:left'><caption>Table-C</caption><tr><td>Africa</td></tr><tr><td>Asia-Pacific</td></tr><tr><td>Europe</td></tr><tr><td>North America</td></tr></table> | <table style='float:left'><caption>Table-C</caption><tr><td>Africa</td></tr><tr><td>Asia-Pacific</td></tr><tr><td>Europe</td></tr><tr><td>North America</td></tr></table> | ||
| − | <table style='float:left'><caption>Table-D</caption><tr><td>Americas</td><td>732240</td></tr><tr><td>Middle East</td><td>13403102</td></tr><tr><td>South America</td><td>17740392</td></tr><tr><td>South Asia</td><td> | + | <table style='float:left'><caption>Table-D</caption><tr><td>Americas</td><td>732240</td></tr><tr><td>Middle East</td><td>13403102</td></tr><tr><td>South America</td><td>17740392</td></tr><tr><td>South Asia</td><td>9437710</td></tr></table> |
<table style='float:left'><caption>Table-E</caption><tr><td>Americas</td></tr><tr><td>Middle East</td></tr><tr><td>South America</td></tr><tr><td>South Asia</td></tr></table> | <table style='float:left'><caption>Table-E</caption><tr><td>Americas</td></tr><tr><td>Middle East</td></tr><tr><td>South America</td></tr><tr><td>South Asia</td></tr></table> | ||
|type="()"} | |type="()"} | ||
Revision as of 01:14, 6 March 2014
SUM and COUNT QUIZ
| name | region | area | population | gdp |
|---|---|---|---|---|
| Afghanistan | South Asia | 652225 | 26000000 | |
| Albania | Europe | 28728 | 3200000 | 6656000000 |
| Algeria | Middle East | 2400000 | 32900000 | 75012000000 |
| Andorra | Europe | 468 | 64000 | |
| ... | ||||
<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 result that would be obtained from the following code:
SELECT region, SUM(area) FROM bbc WHERE SUM(area) > 15000000 GROUP BY region
| Europe | 17000000 |
| Europe | 17000000 |
| Asia-Pacific | 23460000 |
| North America | 21660000 |
| Europe |
| Asia-Pacific |
| North America |
|type="()"} - Table-A - Table-B - Table-C - No result due to invalid use of the GROUP BY function + No result due to invalid use of the WHERE function
{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 medium population density of each region |type="()"}
-SELECT region, AVG(population/area) AS density FROM bbc
SELECT region, COUNT(population)/COUNT(area) AS density FROM bbc GROUP BY region
SELECT region, SUM(population)/COUNT(area) AS density FROM bbc GROUP BY region
SELECT region, SUM(population)/SUM(area) AS density FROM bbc HAVING region
SELECT region, SUM(population)/SUM(area) AS density FROM bbc GROUP BY region
{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)
{Pick the result that would be obtained from the following code:
SELECT region, SUM(area) FROM bbc GROUP BY region HAVING SUM(area)<= 20000000
| 732240 |
| 13403102 |
| 17740392 |
| 4943771 |
| Africa | 22550927 |
| Asia-Pacific | 28759578 |
| Europe | 23866987 |
| North America | 21660000 |
| Africa |
| Asia-Pacific |
| Europe |
| North America |
| Americas | 732240 |
| Middle East | 13403102 |
| South America | 17740392 |
| South Asia | 9437710 |
| Americas |
| Middle East |
| South America |
| South Asia |
|type="()"} - Table-A - Table-B - Table-C + Table-D - Table-E
</quiz>
