SQLZOO——SELECT Quiz

1. Select the code which produces this table

SELECT name, population
FROM world
WHERE population BETWEEN 1000000 AND 1250000

 2. Pick the result you would obtain from this code:

SELECT name, population
FROM world
WHERE name LIKE "Al%"

 

 3. Select the code which shows the countries that end in A or L

SELECT name
FROM world
WHERE name LIKE '%a' OR name LIKE '%l'

4. Pick the result from the query

SELECT name,length(name)
FROM world
WHERE length(name)=5 and region='Europe'

 5. Here are the first few rows of the world table:

 

6. Select the code that would show the countries with an area larger than 50000 and a population smaller than 10000000

SELECT name, area, population
FROM world
WHERE area > 50000 AND population < 10000000

 7. Select the code that shows the population density of China, Australia, Nigeria and France

SELECT name, population/area
FROM world
WHERE name IN ('China', 'Nigeria', 'France', 'Australia')