June 2005
Intermediate to advanced
794 pages
18h 27m
German
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12.13 Abfragen programmgesteuert erstellen
Problem
Sie möchten eine INSERT- oder UPDATE-Abfrage aus einem Array von Feldnamen zusammenstellen. Zum Beispiel möchten Sie einen neuen Benutzer in Ihre Datenbank einfügen. Anstatt alle Felder mit den Benutzerinformationen (wie Benutzername, E-Mail-Adresse, Postanschrift, Geburtsdatum usw.) fest einzuprogrammieren, schreiben Sie die Feldnamen in ein Array und setzen mit Hilfe dieses Arrays die Abfrage zusammen. Dies ist leichter zu pflegen, insbesondere wenn Sie bedingte INSERT- oder UPDATE-Anweisungen mit derselben Gruppe von Feldern durchführen möchten.
Lösung
Sie erstellen eine UPDATE-Abfrage, indem Sie ein Array mit Feld/Wert-Paaren bilden und mit join( ) alle Felder dieses Arrays verknüpfen:
$fields ...
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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.