国外版

算法题（国外版）/big-countries.html

@@ -0,0 +1,54 @@
+<p>Table: <code>World</code></p>
+
+<pre>
++-------------+---------+
+| Column Name | Type    |
++-------------+---------+
+| name        | varchar |
+| continent   | varchar |
+| area        | int     |
+| population  | int     |
+| gdp         | int     |
++-------------+---------+
+name is the primary key column for this table.
+Each row of this table gives information about the name of a country, the continent to which it belongs, its area, the population, and its GDP value.
+</pre>
+
+<p>&nbsp;</p>
+
+<p>A country is <strong>big</strong> if:</p>
+
+<ul>
+	<li>it has an area of at least&nbsp;three million (i.e., <code>3000000 km<sup>2</sup></code>), or</li>
+	<li>it has a population of at least&nbsp;twenty-five million (i.e., <code>25000000</code>).</li>
+</ul>
+
+<p>Write an SQL query to report the name, population, and area of the <strong>big countries</strong>.</p>
+
+<p>Return the result table in <strong>any order</strong>.</p>
+
+<p>The query result format is in the following example.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> 
+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   | 100990000000 |
++-------------+-----------+---------+------------+--------------+
+<strong>Output:</strong> 
++-------------+------------+---------+
+| name        | population | area    |
++-------------+------------+---------+
+| Afghanistan | 25500100   | 652230  |
+| Algeria     | 37100000   | 2381741 |
++-------------+------------+---------+
+</pre>