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SQL Handbuch für Anfänger
- Mit SQL Datenbanken Schritt für Schritt anlegen, verwalten und abfragen - inkl. Praxisbeispiele
- Narrado por: Christopher Linek
- Duración: 1 h y 18 m
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Resumen del Editor
Kam Ihnen beim Bezahlen Ihrer Einkäufe im Supermarkt schon mal die Frage, wie all die vielen Transaktionen samt der enthaltenen Artikel, Rabatte und weiteren wichtigen Informationen in Windeseile weiterverarbeitet und gespeichert werden und wie jede Transaktion direkt auf einem Kassenbon landet?
Oder haben Sie sich schon mal gefragt, wie große Versicherungsanbieter unter Millionen Kunden und vermutlich Milliarden persönlicher Daten (Alter, Wohnort, Familienstand, Art der Versicherung etc.) in kürzester Zeit die spezifischen Daten eines einzelnen Kunden finden können, wenn dieser Nachfragen dazu hat?
Oder waren Sie erstaunt, dass Sie beim Kundenservice Ihres Internetanbieters eine halbe Stunde in der Warteschleife hingen, die Mitarbeiterin dann aber binnen weniger Sekunden Ihre Vertragsdaten gefunden hat?
Oder haben Sie viel zielstrebiger nach diesem Buch oder einem ähnlichen Buch Ausschau gehalten, weil Sie schon etwas von der Antwort auf die soeben gestellten Fragen wissen und sich nun näher darüber informieren möchten? Eventuell sogar, weil dies für Ihre berufliche Zukunft nötig ist?
Ganz gleich, weshalb Sie auf dieses Buch gestoßen sind, die Antwort auf Ihre Fragen lautet "SQL". Egal, ob SQL für Sie nun ein mysteriöses Zauberwort oder doch schon ein geläufiger Begriff ist, werden Sie im Folgenden erfahren, was diese drei Buchstaben zu bedeuten haben. Und falls Sie am Ball bleiben, werden Sie auch in der Lage sein, die Grundsätze von SQL selbst zu erlernen. Sie werden nicht nur verstehen, wie SQL Millionen oder gar Milliarden von Einträgen in einer Datenbank binnen Sekunden durchsuchen, aktualisieren, speichern oder löschen kann, sondern auch, wie Sie selbst in einem Urwald aus Daten den richtigen "Baum" ausfindig machen und Ihren Wünschen entsprechend umgestalten können.
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