SQL GROUP BY 和 SUM

Question

列出总人口至少为 1 亿的大陆。

World Table

name         continent  area    population  gdp
Afghanistan  Asia       652230  25500100    20343000000
Albania      Europe     28748   2831741     12960000000
Algeria      Africa     2381741 37100000    188681000000
Andorra      Europe     468     78115       3712000000
Angola       Africa     1246700 20609294    10009000990
...
...

我开始于

SELECT continent FROM world WHERE ...有点被困在这里了。

不知道如何利用 GROUP BY 和 SUM。我需要GROUP BY continent一些 SUM(population)方法，但我仍在学习如何将东西组合在一起。

预期产出

continent
Africa
Asia
Eurasia
Europe
North America
South America

Answer 1

SELECT   continent, SUM(population)
FROM     world
GROUP BY continent
HAVING   SUM(population) >= 100000000