#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
Смотреть видео
BY SQL для тестировщика
Telegram is a cloud-based instant messaging service that has been making rounds as a popular option for those who wish to keep their messages secure. Telegram boasts a collection of different features, but it’s best known for its ability to secure messages and media by encrypting them during transit; this prevents third-parties from snooping on messages easily. Let’s take a look at what Telegram can do and why you might want to use it.
The Singapore stock market has alternated between positive and negative finishes through the last five trading days since the end of the two-day winning streak in which it had added more than a dozen points or 0.4 percent. The Straits Times Index now sits just above the 3,060-point plateau and it's likely to see a narrow trading range on Monday.
SQL для тестировщика from hk