SQLZOO:About
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SQLZoo includes tutorials and reference to support people learning SQL. It features:
- Interactive access to several SQL engines
- Sample databases
- Practical exercise
- Instant feedback on the success of the student's attempts
Format
Here is an example of a question:
Warming up
Read the notes about this table. Observe the result of running a simple SQL command.
SELECT name, region, population FROM bbc
<source lang='sql' class='ans'>
SELECT name, region, population FROM bbc
Large Countries
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
</source>