Concise Guide to Databases: A Practical Introduction by Paul Crowther, Peter Lake

By Paul Crowther, Peter Lake

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

This easy-to-read textbook/reference provides a accomplished creation to databases, establishing with a concise historical past of databases and of information as an organisational asset. As relational database administration platforms aren't any longer the single database answer, the ebook takes a much wider view of database know-how, encompassing immense facts, NoSQL, item and object-relational, and in-memory databases. The textual content additionally examines the problems of scalability, availability, functionality and safety encountered whilst development and working a database within the actual world.

Topics and features:

* provides evaluate and dialogue questions on the finish of every bankruptcy, as well as skill-building, hands-on exercises
* Introduces the elemental strategies and applied sciences in database structures, putting those in an ancient context
* Describes the demanding situations confronted by means of database professionals
* studies using various database varieties in enterprise environments
* Discusses parts for extra learn inside of this fast-moving domain
* indicates a constitution for a possible college direction within the preface

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

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

Sample text

ROBO BOOKS MONOGRAPH USING THE ORADEBUG UTILITY The Seg Id shows 22026 for the shared memory that is attached to the RUNNING instance. If you were looking to remove a memory segment from a crashed instance (for example from a broken pipe in Unix) you would now know that this shared memory segment is not the one to remove. The Semaphore identifier shows 5312023 for the semaphore that is attached to the RUNNING instance. Again, a broken pipe in Unix could result in an instance crash where the memory and semaphore assignments are left hanging, this would show that this semaphore set was not the one to remove.

By doing alter system kill session, followed by zapping processes, followed by PMON wakeup, you get nearly instant results. MONOGRAPH PAGE 25 COPYRIGHT © 2002 RAMPANT TECHPRESS. ALL RIGHTS RESERVED. ROBO BOOKS MONOGRAPH USING THE ORADEBUG UTILITY How to Trace Trigger Actions Using Oradebug Tracing trigger actions is easy to do in oradebug, you simply set the 10309 event using a level 1 trace. $ sqlplus -s /nolog SQL> connect / as sysdba Connected. SQL> oradebug event 10309 trace name context forever, Statement Porcessed.

Then set your debug session to point to that process: >sqlplus /nolog SQL> connect sys as sysdba Password: xxxxxxx Connected. SQL> oradebug setospid 21335 Oracle pid: 13, Unix process pid: 21335, image: oracleKLF And then you can suspend its execution using suspend: SQL> oradebug suspend Statement processed. This stops a process dead in its tracks, examining v$session_wait shows that it is waiting on the debugger: 8 GTX2 INACTIVE debugger Resuming A Process using Oradebug To start a suspended process off again use the resume command: MONOGRAPH PAGE 27 COPYRIGHT © 2002 RAMPANT TECHPRESS.

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