SQL is a standardized query language for requesting information from a database. You can verify your knowledge by trying to answer a few simple questions.
Insects are among the most diverse groups of animals on the planet, including more than a million described species and representing more than half of all known living organisms.
The Inca Empire or Inka Empire was the largest empire in South America. It was the last sovereign political entity that emerged from the Andean civilizations before conquest by Spaniards.
Sochi is a city in Krasnodar Krai, Russia. This winter Sochi will be in the center of the action, becouse it will host the biggest winter event on the world, Winter Olympic Games.
