July 2012
Beginner to intermediate
744 pages
24h 42m
Polish
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Rozdział 9. Analiza danych za pomocą kwerend krzyżowych i tabel przestawnych
Access chce i potrafi przechować w bazie danych wszystkie szczegóły. Ale czasem nie chcemy wiedzieć wszystkiego — wystarczy nam ogólny obraz. Potrzebujemy narzędzia, które pobierze surowe dane mogące stanowić setki czy tysiące rekordów i podsumuje je w rozsądny sposób.
Poznałeś już jeden sposób analizy dużych ilości informacji: kwerendy podsumowujące (2). Za pomocą kwerend podsumowujących możemy pobrać znaczną liczbę wierszy i zredukować ją do kilku zgrabnie pogrupowanych sum pośrednich. W tym rozdziale poznasz dwie bardziej wyspecjalizowane możliwości analizy liczb: kwerendy krzyżowe i tabele przestawne.
Kwerendy krzyżowe i tabele przestawne pełnią tę samą rolę, co kwerendy ...
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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.