June 2016
Intermediate to advanced
404 pages
11h 4m
German
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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.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.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.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.
2 Einführung in Persistenz und relationale Datenbanken
In nahezu allen Geschäftsanwendungen muss eine Vielzahl unterschiedlicher Daten verarbeitet, verwaltet und dauerhaft, d. h. über das Programmende hinaus, gesichert werden. Letzteres bezeichnet man als Datenpersistenz oder auch kürzer als Persistenz. Diese ist deswegen von so großer Bedeutung, weil Objekte die Ausführungsdauer eines Programms nicht »überleben«. Demnach geht der durch die einzelnen Objektzustände beschriebene Anwendungszustand verloren. Häufig ist genau das jedoch nicht akzeptabel, weil die Daten der Objekte auch zu späteren Zeitpunkten weiterhin verfügbar sein müssen, etwa die Bestellungen eines Onlineshops.
Zur Realisierung von Persistenz gibt es verschiedene Varianten, unter ...
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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.