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Reduce Costs and Improve Operations by Upgrading to Oracle
Reduce Costs and Improve Operations by Upgrading to Oracle

... environment to reduce network traffic by compressing the redo stream. Compressing the redo stream is a technique primarily used by organizations that have high-latency or low-bandwidth connections between their primary and standby databases. An important new feature in Advanced Compression Option wi ...
Original Exploring the IDS Utilities (7.X) article
Original Exploring the IDS Utilities (7.X) article

Oracle Database 11g New Features
Oracle Database 11g New Features

... Upgrades supported Can be a bit tedious and requires a number of manual steps. Recommend you use a checklist! More overall control over the upgrade process. Most steps can be re-executed if they fail once you have corrected the cause of the failure. ...
1 Survey of Graph Database Models - DCC
1 Survey of Graph Database Models - DCC

... serves as base for the development of related models. Before the advent of the relational model, most db-models focused essentially on the specification of data structures on actual file systems. Two representative db-models are the hierarchical [Tsichritzis and Lochovsky 1976] and the network [Tayl ...
Chapter 12: Indexing and Hashing
Chapter 12: Indexing and Hashing

... updating indices imposes overhead on database modification - when a file is modified, every index on the file must be updated,  Sequential scan using primary index is efficient, but a sequential scan ...
from instructor - Computer Science
from instructor - Computer Science

... The where clause specifies conditions that the result must satisfy Corresponds to the selection predicate of the relational algebra. To find all instructors in Comp. Sci. dept with salary > 80000 select name from instructor where dept_name = ‘Comp. Sci.' and salary > 80000 Comparison results can be ...
Introduction To Database Management Systems
Introduction To Database Management Systems

Using SAS with Oracle to Add a Replica of a Large Operational Database to a Data Warehouse
Using SAS with Oracle to Add a Replica of a Large Operational Database to a Data Warehouse

... different buffsizes -- one to optimise the updating of the database, and the other to optimise the query access. One view descriptor was used to select all fields in the tables. The third descriptor was created for the users and provided read only access. At this stage, the users have two view descr ...
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NET Data Access Architecture Guide - Michetti Information Solutions

DeReportection of an SQL Injection Attack
DeReportection of an SQL Injection Attack

Performance Optimizer 2.0.0 Product Guide
Performance Optimizer 2.0.0 Product Guide

... score an assessment. The optimal score is 10 and means that your environment is not at risk. The assessment for a score below 9 includes a recommendation for how to improve the health and performance of your environment. Assessments that receive a score lower than 9 don't always require action. See ...
course: database management system
course: database management system

... personal databases. However, it may not leave an audit trail of actions or provide the kinds of controls necessary in a multi-user organization. These controls are only available when a set of application programs are customized for each data entry and updating function. A transaction mechanism, tha ...
Slides from Lecture 19 - Courses - University of California, Berkeley
Slides from Lecture 19 - Courses - University of California, Berkeley

... Specify database access policies (DA & DBA) Establish Security controls (DBA) Supervise Database loading (DBA) Specify test procedures (DBA) ...
FrontBase® Users Guide
FrontBase® Users Guide

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... The SQL data-definition language (DDL) allows the specification of information about relations, including:  The schema for each relation.  The domain of values associated with each attribute.  Integrity constraints ...
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... The SQL data-definition language (DDL) allows the specification of information about relations, including:  The schema for each relation.  The domain of values associated with each attribute.  Integrity constraints ...
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... Guarantee that executing a test query on a test database can obtain the desired intermediate query results (e.g.,. output cardinality, data distribution) ...
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No Slide Title

... Suppose employees of a bank may have jobs (responsibilities) at multiple branches, with different jobs at different branches. Then there is a ternary relationship set between entity sets employee, job and branch ...
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db_ch2

...  Use of entity sets vs. relationship sets Possible guideline is to designate a relationship set to describe an action that occurs between entities  Binary versus n-ary relationship sets Although it is possible to replace any nonbinary (n-ary, for n > 2) relationship set by a number of distinct bin ...
Database Integration Guide
Database Integration Guide

from instructor - Computer Engineering Department
from instructor - Computer Engineering Department

... The SQL data-definition language (DDL) allows the specification of information about relations, including:  The schema for each relation.  The domain of values associated with each attribute.  Integrity constraints ...
PHP_Bible
PHP_Bible

... potentially be easier to maintain. However there are quite a few things you might want to do that can't be done easily with this model If something goes wrong with the submission, it's very difficult to redisplay the form with the values you just filled in. This is especially important with a user r ...
The State of the Art in Distributed Query Processing
The State of the Art in Distributed Query Processing

... mainframe computer. So, it makes economic sense to replace a mainframe by a network of small, off-the-shelf processors. Furthermore, it is very difficult to “up-size” a mainframe computer if a company grows, while new PCs can be added to the network at any time in order to meet a company’s new requi ...
introductory SQL
introductory SQL

... inserting, updating, and deleting rows in a table, creating, replacing, altering, and dropping objects, ...
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MySQL

... An introduction for the novice ...
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Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
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