Основы использования и проектирования баз данных. Владимир Михайлович Илюшечкин. Читать онлайн. Newlib. NEWLIB.NET

Автор: Владимир Михайлович Илюшечкин
Издательство: ЮРАЙТ
Серия:
Жанр произведения: Базы данных
Год издания: 2009
isbn: 978-5-9692-0253-5
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кортежей первого отношения R с кортежами второго отношения S. Только те кортежи подвергаются конкатенации, в которых значение заданного атрибута X в отношении R совпадает со значением заданного атрибута Y в отношении S:

      Конец ознакомительного фрагмента.

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