Read e-book online Concise Guide to Databases: A Practical Introduction PDF

By Paul Crowther, Peter Lake

ISBN-10: 1447156013

ISBN-13: 9781447156017

Sleek companies depend upon information for his or her very survival, making a want for classy databases and database applied sciences to assist shop, organise and delivery their important data.

This easy-to-read textbook/reference offers a complete advent to databases, beginning with a concise historical past of databases and of knowledge as an organisational asset. As relational database administration structures aren't any longer the single database answer, the e-book takes a much wider view of database know-how, encompassing huge facts, NoSQL, item and object-relational, and in-memory databases. The textual content additionally examines the problems of scalability, availability, functionality and protection encountered while construction and operating a database within the genuine world.

Topics and features:

* offers overview and dialogue questions on the finish of every bankruptcy, as well as skill-building, hands-on exercises
* Introduces the elemental innovations and applied sciences in database platforms, putting those in an historical context
* Describes the demanding situations confronted by way of database professionals
* experiences using quite a few database varieties in company environments
* Discusses components for additional examine inside of this fast-moving domain
* indicates a constitution for a possible collage path within the preface

With its learning-by-doing process, supported through either theoretical and functional examples, this clearly-structured textbook can be of serious price to complex undergraduate and postgraduate scholars of machine technological know-how, software program engineering, and knowledge expertise. practicing database pros and alertness builders also will locate the e-book an excellent reference that addresses today's company wishes.

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Read Online or Download Concise Guide to Databases: A Practical Introduction (Undergraduate Topics in Computer Science) PDF

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Extra resources for Concise Guide to Databases: A Practical Introduction (Undergraduate Topics in Computer Science)

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November 2009 4:41 16 Weitere Features von pgAdmin III Prüfen, ob alles stimmt Sie können in pgAdmin III leicht prüfen, ob das Setzen der Privilegien erfolgreich war. Markieren Sie dazu eine der Tabellen und wechseln Sie rechts auf den Reiter ABHÄNGIGKEITEN. Dort sollten Sie nun einen Eintrag in der Liste sehen, der folgende Eigenschaften hat: TYP: ROLE NAME: MARKETING BESCHRÄNKUNG: ACL Ist dem so, ist alles paletti. Der Test mit psql Probieren Sie's aus, indem Sie sich als Benutzer psbesucher in psql mit der Datenbank psbuch verbinden: postgres=# \c postgresqlbuch psbesucher You are now connected to database "postgresqlbuch" as user "psbesucher" postgresqlbuch=> SELECT * FROM kapitel; nr | ueberschrift ------------------1 | … postgresqlbuch=> INSERT INTO kapitel (ueberschrift) VALUES ('gruppenrollen \ test'); ERROR: permission denied for relation kapitel Sehr schön!

Jede Entität hat wiederum Attribute unterschiedlicher Art (einfache, single-value, multi-value, abgeleitete). Halten wir also fest, dass eine Entität eine Tabellenzeile und ein Attribut eine Tabellenspalte im Datenbankmodell darstellt. Wir haben bereits gesehen, dass die Tabellen in einer Beziehung zueinander stehen. Dies kann beispielsweise eine 1:1-, 1:n- oder n:m-Beziehung sein. Im ER-Modell werden diese Beziehungen grafisch durch Linien dargestellt. Die Linien und deren Art beziehungsweise Zusätze sind also eine weitere visuelle Darstellung für die Beziehung der im Modell befindlichen Tabellen untereinander.

Sie können im HTML-Format sogar eine eigene CSS-Datei für das Layout bestimmen. Obwohl Sie hier nur begrenzte Möglichkeiten haben, ist es doch oft hilfreich, gewisse Informationen über eine Datenbank in dieser Form zu speichern. Nett! Backup und Wiederherstellen Die PostgreSQL Datenbank wartet mit sehr mächtigen Backup- und Restore-Tools für die Kommandozeile auf (pg_dump und pg_restore). Sie haben im Bereich Werkzeuge über die Menüeinträge Backup und Wiederherstellen Zugriff auf diese Befehle – ein extrem praktisches Hilfsmittel, um eine Datenbank (oder Teile davon) zu sichern und wiederherzustellen.

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Concise Guide to Databases: A Practical Introduction (Undergraduate Topics in Computer Science) by Paul Crowther, Peter Lake


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