Difference between revisions of "Archived SELECT from WORLD Tutorial"

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</div>
 
</div>
  
==World Country Profiles==
+
==Country Profile==
 
In this tutorial you will use the SELECT command on the table <code>World</code>:
 
In this tutorial you will use the SELECT command on the table <code>World</code>:
  
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==Warming up==
 
==Warming up==
 
<div class='qu'>
 
<div class='qu'>
[[Read_the_notes_about_this_table. |Read the notes about this table.]] Observe the result of running a simple SQL command.
+
[[Read_the_notes_about_this_table. |Read the notes about this table.]] Observe the result of running a simple SQL command.  
 
<source lang='sql' class='def'>
 
<source lang='sql' class='def'>
 
SELECT name, continent, population FROM world
 
SELECT name, continent, population FROM world
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<div class='qu'>
 
<div class='qu'>
Show the <code>name</code> and <code>population</code> in millions for the countries of 'Middle East'
+
Show the <code>name</code> and <code>population</code> in millions for the countries of 'South America'
 
Divide the population by 1000000 to get population in millions.  
 
Divide the population by 1000000 to get population in millions.  
 
<source lang='sql' class='def'>
 
<source lang='sql' class='def'>
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<source lang='sql' class='ans'>
 
<source lang='sql' class='ans'>
 
SELECT name, population/1000000 FROM world
 
SELECT name, population/1000000 FROM world
   WHERE continent='Middle East'
+
   WHERE continent='South America'
 
</source>
 
</source>
 
</div>
 
</div>
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<div>
 
<div>
 
<div class="lsclear">Clear your results</div>
 
<div class="lsclear">Clear your results</div>
<p><div class="quizlink">[[world QUIZ]]</div></p>
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<p><div class="quizlink">[[BBC QUIZ]]</div></p>
 
</div>
 
</div>
 
<h2>What Next</h2>
 
<h2>What Next</h2>
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   [http://sqlzoo.net/~andrew/brain/bt.htm Find the duplicate]
 
   [http://sqlzoo.net/~andrew/brain/bt.htm Find the duplicate]
 
   </li>
 
   </li>
   <li>You can to continue practicing the the same techniques
+
   <li>You can to continue practising the the same techniques
 
     and gain more experience of the basic skills on the Nobel table.
 
     and gain more experience of the basic skills on the Nobel table.
 
   [[SELECT_from_Nobel_Tutorial |The <code>WHERE</code> statement using the
 
   [[SELECT_from_Nobel_Tutorial |The <code>WHERE</code> statement using the
 
   <code>nobel</code> table.]]
 
   <code>nobel</code> table.]]
 
   </li>
 
   </li>
   <li>You can learn about nested statements, these are instructive
+
   <li>You can learn about nested statements, these are instructive and entertaining, but not essential for beginners.
    and entertaining, but rarely useful.
+
 
   [[SELECT_within_SELECT_Tutorial |Nested <code>SELECT</code> statements using the
 
   [[SELECT_within_SELECT_Tutorial |Nested <code>SELECT</code> statements using the
 
   <code>world</code> table.]]</li>
 
   <code>world</code> table.]]</li>
 
  </ul>
 
  </ul>

Revision as of 12:46, 10 October 2013

namecontinentarea populationgdp
AfghanistanAsia6522302550010020343000000
AlbaniaEurope28748 2831741 12960000000
AlgeriaAfrica2381741 37100000 188681000000
AndorraEurope46878115 3712000000
AngolaAfrica1246700 20609294 100990000000
...

Contents

Country Profile

In this tutorial you will use the SELECT command on the table World:

Summary

Warming up

Read the notes about this table. Observe the result of running a simple SQL command.

SELECT name, continent, population FROM world
SELECT name, continent, population FROM world

Large Countries

How to use WHERE to filter records.

Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros)

SELECT name FROM world
WHERE population>250000000
SELECT name FROM world
WHERE population>200000000


Give the name and the per capita GDP for those countries with a population of at least 200 million.

per capita GDP is the GDP divided by the population GDP/population

 
SELECT name, gdp/population FROM world
  WHERE population > 200000000

Show the name and population in millions for the countries of 'South America' Divide the population by 1000000 to get population in millions.

 
SELECT name, population/1000000 FROM world
  WHERE continent='South America'

Show the name and population for 'France', 'Germany', 'Italy'

 
SELECT name, population FROM world
  WHERE name IN ('France','Germany','Italy')

Identify the countries which have names including the word 'United'

 
SELECT name FROM world
  WHERE name LIKE '%United%'
Clear your results

What Next

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