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-- What years are covered by the dataset? (you can manually count the number of years returned). | |
SELECT DISTINCT year | |
FROM population_years; | |
-- What is the largest population size for Gabon in this dataset? | |
SELECT * | |
FROM population_years | |
WHERE country='Gabon' | |
ORDER BY population DESC | |
LIMIT 1; | |
-- What were the 10 lowest population countries in 2005? | |
SELECT * | |
FROM population_years | |
WHERE population IS NOT NULL | |
ORDER BY population ASC | |
LIMIT 10; | |
-- What are all the distinct countries with a population of over 100 million in the year 2010? | |
SELECT DISTINCT country | |
FROM population_years | |
WHERE population > 1 | |
AND year = 2010; | |
-- How many countries in this dataset have the word “Islands” in their name? | |
SELECT COUNT(*) AS 'Islands' | |
FROM population_years | |
WHERE country LIKE '%Islands%'; | |
-- What is the difference in population between 2000 and 2010 in Indonesia? | |
SELECT population | |
FROM population_years | |
WHERE country = 'Indonesia' AND year = 2000 | |
OR country = 'Indonesia' AND year = 2010; |
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