October 2012
Intermediate to advanced
360 pages
10h 3m
Polish
Content preview from Access. Analiza danych. RecepturyBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Rozdział 1. Tworzenie kwerend
Kwerendy wybierające są jednym z najważniejszych elementów każdej bazy danych. To właśnie tego typu kwerend, zbierających dane w sposób pasywny (bez modyfikacji danych źródłowych), używamy najczęściej do odszukiwania odpowiedzi na pytania dotyczące danych przechowywanych w bazie. W swojej podstawowej, najprostszej wersji kwerenda wybierająca po prostu zwraca w odpowiedzi wszystkie rekordy danej tablicy. Taka forma zapytania nie jest zbyt interesująca, ponieważ otrzymujemy dokładnie takie same informacje jak w przypadku bezpośredniego przeglądania zawartości tablicy. Dopiero dodanie określonych kryteriów wyszukiwania, sprzężeń oraz innych, użytecznych funkcji i metod języka SQL powoduje, że kwerendy wybierające pokazują ...
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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.