July 2021
Intermediate to advanced
336 pages
10h 56m
Polish
Content preview from Wprowadzenie do SQL
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Rozdział 15. Metadane
Poza wszystkimi danymi wstawianymi do bazy danych przez różnych użytkowników serwer musi przechowywać także informacje o wszystkich obiektach bazy danych (tabelach, widokach, indeksach itd.) utworzonych na potrzeby obsługi tych danych. Nie powinno być zaskoczeniem, że serwer umieszcza w bazie danych te dodatkowe informacje, zwane metadanymi. Z lektury tego rozdziału dowiesz się, jak i gdzie są przechowywane metadane, jak uzyskać do nich dostęp, a także jak je wykorzystać do tworzenia elastycznych systemów.
Dane dotyczące danych
Metadane to w zasadzie dane danych. W trakcie każdej operacji tworzenia obiektu bazy danych serwer musi zachować także różne informacje. Na przykład jeśli tworzysz tabelę z wieloma kolumnami, ograniczeniem ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.