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December 08, 17:12 MSK

Exercises on usage of SELECT statement

  Here you can practice in solving exercises on data retrieving (SELECT statement of SQL language). The tasks of the first stage testing are accessible without registration (the "Enter without login" button). However, for your decisions were kept in system, the statistics of the solved problems was conducted, there was an opportunity of participation in ratings and discussions, to be able to order the certificate, registration and the authorized logon is required. More about certification.
  On this page it is possible to carry out any SELECT statements addressed to the learning databases. To switch off check of accuracy of the decision, click "without check" checkbox. After solving all the tasks of the first stage, the second stage of testing becomes accessible. Thus tasks of the second stage appear one by one in the combo box of the task choice.

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