SQL задачи@sqlquestions P.1392

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SQL задачи@sqlquestions P.1392

SQLQUESTIONS Telegram 1392

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Что обеспечивает внешний ключ FOREIGN KEY (category_id) REFERENCES category(category_id) в таблице product?

Anonymous Quiz

Уникальность каждой категории

Что каждая категория имеет хотя бы один продукт

Целостность данных между таблицами product и category

Что нельзя добавлять новые категории

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