#посмотреть
▫️Схема базы данных
▫️Таблицы на схеме базы данных
▫️Столбцы таблиц и типы данных в них на схеме
▫️Связи между таблицами
▫️Типы связей
▫️Примеры таблиц БД онлайн-школы
▫️Пример SQL запроса с JOIN для извлечения данных
▫️Пример использования схемы для объединения трех таблиц
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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.
Telegram has made it easier for its users to communicate, as it has introduced a feature that allows more than 200,000 users in a group chat. However, if the users in a group chat move past 200,000, it changes into "Broadcast Group", but the feature comes with a restriction. Groups with close to 200k members can be converted to a Broadcast Group that allows unlimited members. Only admins can post in Broadcast Groups, but everyone can read along and participate in group Voice Chats," Telegram added.
SQL для тестировщика from ca