June 2010
Intermediate to advanced
900 pages
23h 11m
German
Content preview from Microsoft Access 2010 - Das HandbuchBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Zusammenfassung
In diesem Kapitel haben Sie einen ersten Einblick in die Sprache SQL erhalten, die hinter allen Abfragen von Access steht:
SQL besteht aus den drei Bereichen Datendefinition, Datenmanipulation und Datenrechteverwaltung („SQL, die Sprache für Datenbanken“), von denen für uns nur die Befehle zur Datenmanipulation wichtig sind.
SQL kann entweder indirekt über den grafischen Abfrageentwurf erstellt werden oder indem Sie den Code direkt im SQL-Entwurf angeben:
Ein gültiges SQL-Statement muss mindestens die beiden SQL-Schlüsselwörter SELECT und FROM („SQL-Schlüsselwörter“) enthalten.
Dazu kommt eventuell die WHERE-Klausel („Filtern“) zum Filtern der Daten mit einer folgenden Bedingung.
Ebenfalls optional ist ORDER BY zum Sortieren („Sortieren“ ...
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