zoukankan      html  css  js  c++  java
  • 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      |
    +--------------+-------------+--------------+



    如果一个国家面积超过300万平方公里,或者人口超过2500万,就是大国。编写一个SQL解决方案,以输出大国的名称、人口和地区


    MySQL(2781ms):
    1 # Write your MySQL query statement below
    2 SELECT name , population , area
    3 FROM World
    4 WHERE population > 25000000 OR area > 3000000 ;
  • 相关阅读:
    数组的简单操作
    关系型数据库的设计范式

    高斯分布
    一 .HTTP协议
    为什么OGNL表达式功能强大?
    官方文档 恢复备份指南三 Recovery Manager Architecture
    官方文档 恢复备份指南二 Getting Started with RMAN
    官方文档 恢复备份指南一 Introduction to Backup and Recovery
    Python中lambda使用简易教程
  • 原文地址:https://www.cnblogs.com/mengchunchen/p/8315751.html
Copyright © 2011-2022 走看看