Difference between revisions of "SELECT names"

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<div class='qu'>
 
<div class='qu'>
<p class='imper'>Find the country that contain the letter '''x'''</p>
+
Luxembourg has an '''x''' - so does one other country. List them both.
 +
<p class='imper'>Find the countries that contain the letter '''x'''</p>
  
 
<source lang='sql' class='def'>
 
<source lang='sql' class='def'>
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SELECT name FROM world
 
SELECT name FROM world
 
   WHERE name LIKE '%x%'
 
   WHERE name LIKE '%x%'
 +
</source>
 +
</div>
 +
 +
<div class='qu'>
 +
Iceland, Switzerland end with '''land''' - but are there others?
 +
<p class='imper'>Find the countries that end with '''land'''</p>
 +
 +
<source lang='sql' class='def'>
 +
SELECT name FROM world
 +
  WHERE name LIKE 'T%'
 +
</source>
 +
 +
<source lang='sql' class='ans'>
 +
SELECT name FROM world
 +
  WHERE name LIKE '%land'
 
</source>
 
</source>
 
</div>
 
</div>

Revision as of 21:00, 20 November 2014

namecontinent
AfghanistanAsia
AlbaniaEurope
AlgeriaAfrica
AndorraEurope
AngolaAfrica
....

Pattern Matching Strings

This tutorial uses the LIKE operator to check names. We will be using the SELECT command on the table world:

Summary

You can use WHERE name LIKE 'B%' to find the countries that start with "B".

  • The % is a wild-card it can match any characters

Find the country that start with Y

SELECT name FROM world
  WHERE name LIKE 'F%'
SELECT name FROM world
  WHERE name LIKE 'Y%'


Find the countries that end with y

SELECT name FROM world
  WHERE name LIKE 'T%'
SELECT name FROM world
  WHERE name LIKE '%y'

Luxembourg has an x - so does one other country. List them both.

Find the countries that contain the letter x

SELECT name FROM world
  WHERE name LIKE 'T%'
SELECT name FROM world
  WHERE name LIKE '%x%'

Iceland, Switzerland end with land - but are there others?

Find the countries that end with land

SELECT name FROM world
  WHERE name LIKE 'T%'
SELECT name FROM world
  WHERE name LIKE '%land'