> Prices and Donations
You can buy the solution of the quizzes (regarding Oracle or Postgresql) published here:


These are the prices of these quizzes:

 Topic Level Year  Number of
  Basic Quiz NEW 2 2018 - today >50 34,99
  Advanced Quiz NEW 3 2018 - today 9 79,99
  Advanced Quiz OLD 3 2005 - 2017 >50 109,99
  1 Quiz (*) 2-3 2005 - today 1 24,99

(*) you choose the quiz

When a quiz is added:

About every month (every 2 months since 2024), in my website I add a new quiz :
It could be:
- Quiz level 1 (very easy) : I'll immediately write the solution on the website
- Quiz level 2 (medium easy) : I'll write the solution 6 years after the quiz is published. Otherwise you can buy it before
- Quiz level 3 (hard or long to be implemented) : you can buy the solution. I will send it to you by e-mail


To do the subscription or to ask any questions, write to:

How to pay:

You have 2 methods to pay:


My Paypal account is
If you prefer to have the direct link for the payment, please write me an email and I will send you the link ("money request") thru paypal.


Write me an email in order to have my QR code to do the payment:


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