📖 Справочник по SQL
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Этот гайд на 16 страниц охватывает все, что вам нужно знать про SQL — от самых базовых команд до оконных функций
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BY SQL для тестировщика
Telegram is a free app and runs on donations. According to a blog on the telegram: We believe in fast and secure messaging that is also 100% free. Pavel Durov, who shares our vision, supplied Telegram with a generous donation, so we have quite enough money for the time being. If Telegram runs out, we will introduce non-essential paid options to support the infrastructure and finance developer salaries. But making profits will never be an end-goal for Telegram.
SQL для тестировщика from tr