refactor 595

Author: fishercoder1534

database/_595.sql

@@ -1,26 +1 @@
---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      |
---+--------------+-------------+--------------+
-
 select name, population, area from World where area > 3000000 or population > 25000000;