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