September 2024
Intermediate to advanced
974 pages
27h 37m
German
Content preview from MySQL Kochbuch, 4. Auflage
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Kapitel 4. Schreiben von MySQL-basierten Programmen
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4.0 Einleitung
In diesem Kapitel wird die Verwendung von MySQL im Kontext einer Allzweckprogrammiersprache erläutert. Es behandelt die grundlegenden Operationen der Anwendungsprogrammierschnittstelle (API), die die Basis für die in späteren Kapiteln entwickelten Programmierrezepte bilden. Zu diesen Operationen gehören die Verbindung zum MySQL-Server, die Ausführung von Anweisungen und das Abrufen der Ergebnisse.
MySQL-basierte Client-Programme können in vielen Sprachen geschrieben werden. Dieses Buch behandelt die in Tabelle 4-1aufgeführten Sprachen und Schnittstellen (Informationen zum Bezug der Schnittstellensoftware findest du im Vorwort).
| Sprache | Schnittstelle |
|---|---|
| Perl | Perl DBI |
| Ruby | Mysql2 gem |
| PHP | PDO |
| Python | DB-API |
| Geh | Go sql |
| Java | JDBC |
Die MySQL-Client-APIs bieten die folgenden Funktionen, die jeweils in einem Abschnitt dieses Kapitels behandelt werden:
- Verbinden mit dem MySQL-Server, Auswählen einer Datenbank und Trennen der Verbindung mit dem Server
Jedes Programm, das MySQL verwendet, muss zunächst eine Verbindung zum Server herstellen. Die meisten Programme wählen auch eine Standarddatenbank aus, und brave MySQL-Programme schließen die Verbindung zum Server, wenn sie damit fertig sind.
- Prüfen auf Fehler
Jede Datenbankoperation kann fehlschlagen. ...
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