Difference between revisions of "SUM and COUNT Quiz"

Revision as of 20:22, 19 September 2012

SUM and COUNT QUIZ

bbc
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
...

	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 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

	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()

4. Select the result that would be obtained from the following code:SELECT region, SUM(area) FROM bbc WHERE SUM(area) > 15000000 GROUP BY region

Table-A
Europe	17000000

	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 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 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)

8. Pick the result that would be obtained from the following code: SELECT region, SUM(area) FROM bbc GROUP BY region HAVING SUM(area)<= 20000000

Your score is 0 / 0

@@ Line 74: / Line 74: @@
 |type="()"}
 - Table-A
-+ Table-B
+- 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
++ No result due to invalid use of the WHERE function
 {Select the statement that shows the average population of 'Poland', 'Germany' and 'Denmark'

	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