LeetCode 595. Big Countries

There is a table World

+-----------------+------------+------------+--------------+---------------+
| name            | continent  | area       | population   | gdp           |
+-----------------+------------+------------+--------------+---------------+
| Afghanistan     | Asia       | 652230     | 25500100     | 20343000      |
| Albania         | Europe     | 28748      | 2831741      | 12960000      |
| Algeria         | Africa     | 2381741    | 37100000     | 188681000     |
| Andorra         | Europe     | 468        | 78115        | 3712000       |
| Angola          | Africa     | 1246700    | 20609294     | 100990000     |
+-----------------+------------+------------+--------------+---------------+

A country is big if it has an area of bigger than 3 million square km or a population of more than 25 million.

Write a SQL solution to output big countries' name, population and area.

For example, according to the above table, we should output:

+--------------+-------------+--------------+
| name         | population  | area         |
+--------------+-------------+--------------+
| Afghanistan  | 25500100    | 652230       |
| Algeria      | 37100000    | 2381741      |
+--------------+-------------+--------------+

题目描述：利用 sql 语句查询我们需要的结果

题目分析：简单的 sql 语句，算是入门级的，相信稍微学过一点 mysql 查询的都知道怎么写。直接查询我们需要的参数 name, population, area，从 world 表单中，条件是area > 3000000 或 population > 25000000 。

MySQL 语句如下：

# Write your MySQL query statement below
SELECT
    name, population, area
FROM
    world
WHERE
    area > 3000000 OR population > 25000000
;