Difference between revisions of "SELECT from BBC Tutorial"
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| − | + | ||
| − | + | <div class='ref_section'> | |
| − | < | + | <table class='db_ref'> |
| + | <caption>bbc</caption> | ||
| + | <tr> | ||
<th>name</th> | <th>name</th> | ||
<th>region</th> | <th>region</th> | ||
| Line 40: | Line 42: | ||
</tr> | </tr> | ||
</table> | </table> | ||
| + | </div> | ||
| + | |||
| + | ==BBC Country Profiles== | ||
| + | In this tutorial you will use the SELECT command on the table bbc: | ||
| + | |||
| + | <div class='extra_space' style='width:1em; height:2.5em;'></div> | ||
| + | |||
| + | <div class="progress_panel"><div> | ||
| + | <div class="summary">Summary</div> | ||
| + | <div class="progressbarbg"> | ||
| + | <div class="progressbar"></div> | ||
| + | </div> | ||
| + | </div></div> | ||
==Warming up== | ==Warming up== | ||
<div class='qu'> | <div class='qu'> | ||
| − | [[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, region, population FROM bbc | SELECT name, region, population FROM bbc | ||
| Line 54: | Line 69: | ||
==Large Countries== | ==Large Countries== | ||
| − | [[How to use WHERE to filter records.]] | + | [[WHERE_filters |How to use WHERE to filter records.]] |
<div class='qu'> | <div class='qu'> | ||
Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros) | Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros) | ||
| Line 116: | Line 131: | ||
</source> | </source> | ||
</div> | </div> | ||
| − | + | <div> | |
| + | <div class="lsclear">Clear your results</div> | ||
| + | <p><div class="quizlink">[[BBC QUIZ]]</div></p> | ||
| + | </div> | ||
<h2>What Next</h2> | <h2>What Next</h2> | ||
<ul> | <ul> | ||
| Line 124: | Line 142: | ||
<li>You can to continue practicing the the same techniques | <li>You can to continue practicing 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 |
| − | <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 rarely useful. | and entertaining, but rarely useful. | ||
| − | [ | + | [[SELECT_within_SELECT_Tutorial |Nested <code>SELECT</code> statements using the |
| − | <code>bbc</code> table.</li> | + | <code>bbc</code> table.]]</li> |
</ul> | </ul> | ||
Latest revision as of 20:23, 16 August 2012
| name | region | area | population | gdp |
|---|---|---|---|---|
| Afghanistan | South Asia | 652225 | 26000000 | |
| Albania | Europe | 28728 | 3200000 | 6656000000 |
| Algeria | Middle East | 2400000 | 32900000 | 75012000000 |
| Andorra | Europe | 468 | 64000 | |
| ... | ||||
Contents |
[edit] BBC Country Profiles
In this tutorial you will use the SELECT command on the table bbc:
Summary
[edit] Warming up
Read the notes about this table. Observe the result of running a simple SQL command.
SELECT name, region, population FROM bbc
SELECT name, region, population FROM bbc
[edit] 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 bbc WHERE population>250000000
SELECT name FROM bbc 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 bbc WHERE population > 200000000
Show the name and population in millions for the countries of 'Middle East'
Divide the population by 1000000 to get population in millions.
SELECT name, population/1000000 FROM bbc WHERE region='Middle East'
Show the name and population for 'France', 'Germany', 'Italy'
SELECT name, population FROM bbc WHERE name IN ('France','Germany','Italy')
Identify the countries which have names including the word 'United'
SELECT name FROM bbc WHERE name LIKE '%United%'
Clear your results
What Next
- You can play a game: Find the duplicate
- You can to continue practicing the the same techniques
and gain more experience of the basic skills on the Nobel table.
The
WHEREstatement using thenobeltable. - You can learn about nested statements, these are instructive
and entertaining, but rarely useful.
Nested
SELECTstatements using thebbctable.
