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An Introduction to the Source Code of the Pyrrho DBMS
An Introduction to the Source Code of the Pyrrho DBMS

... basis. The fact and circumstances of such data entry and maintenance provide some evidence for the truthfulness of the data, and, conversely, makes any unusual activity or data easier to investigate. This additional information is made available, normally to the database owner, via SQL queries throu ...
Database Slicing on Relational Databases
Database Slicing on Relational Databases

... these processes if we can select a smaller piece of the database (called a slice) that contains all of the records belonging to the slicing criterion. The slicing criterion might be, for example, a record which gives rise to a bug in the program. Database slicing seeks to select all the records belo ...
A Database-based Email System
A Database-based Email System

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... 3. Use branch_name index to find pointers to all records pertaining to the Perryridge branch. Similarly use index on balance. Take intersection of both sets of pointers obtained. ...
Document
Document

... add the resulting functional dependencies to F + for each pair of functional dependencies f1and f2 in F + if f1 and f2 can be combined using transitivity then add the resulting functional dependency to F + until F + does not change any further ...
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No Slide Title

... Conceptual design using the abstract model like ER Model  Specification of functional requirements (operations & transactions)  Converting the abstract model to implementation details  Logical design phase: convert ER to Tables  Physical design phase: file organization, storage stucture  Design ...
Insert Title Here
Insert Title Here

... If all FDs are “implied by the key” it means that the DBMS only enforces keys (not FDs) and the DBMS is going to enforce the keys anyway otherwise, we have to perform expensive operations to maintain consistency (code or check statements) ...
Best Practices for Synchronous Redo Transport
Best Practices for Synchronous Redo Transport

... the impact of synchronous transport on primary database performance by further shortening the total round-trip time between primary and standby. Fast Sync can introduce a very small exposure to data loss should simultaneous failures impact both primary and standby databases before the standby I/O co ...
Lecture 5: Active Databases
Lecture 5: Active Databases

... e.g. C/C++ in Poet, Java in Oracle, C#/VB in SQL Server ...
Native XML Databases - DAMA-MN
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... • XPath and XQL are most common » Usually include extensions for multi-document queries ...
Upgrade from Oracle9i to Oracle Database 11g
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... make this upgrade the most predictable and risk free database upgrade ever, ensuring excellent performance in the new Oracle Database 11g environment. This technical Oracle White Paper will cover a whole Proof-of-Concept (PoC) done with one of the largest retail companies of the world. The goals of ...
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...  Log Transport Attributes  Standby Redo Logs  Setup Physical Standby step-by-step  Managing and Monitoring standby  Role Transition: Switchover/Failover ...
Quick Recovery Techniques PPT
Quick Recovery Techniques PPT

... • Hot (clustering, synchronous mirroring) • Useful in complete system failure • High bandwidth/connectivity requirements • Warm (asynchronous mirroring, log shipping, replication • Useful for geographical separation • Can help with load balancing in some situations (reporting or read-only data) • Co ...
Session3_Module5
Session3_Module5

... from one or more tables is referred to as a partitioned view. If the base tables reside in the same server, the view is referred to as a local partitioned view. If the base tables reside in different servers, the view is referred to as a distributed partitioned view. ...
Distributed Database Management Systems: A Practical Approach
Distributed Database Management Systems: A Practical Approach

... merchantability or fitness for a particular purpose. No warranty may be created or extended by sales representatives or written sales materials. The advice and strategies contained herein may not be suitable for your situation. You should consult with a professional where appropriate. Neither the pub ...
Presentation summary: XML views in relational databases
Presentation summary: XML views in relational databases

...  The Mediation of Information using XML (MIX) project, which is a joint effort between the San Diego Supercomputer Center and the Database Lab at the University of California San Diego. They are developing a wrapper-mediator system which employs XML as a means for information modeling, as well as i ...
ASP.NET Programming with C# and SQL Server First
ASP.NET Programming with C# and SQL Server First

... standard data manipulation language for many database management systems • Microsoft SQL Server Management Studio Express is a graphic tool for manipulating a SQL Server database • Regular identifiers begin with a letter, underscore, number sign, or at sign ASP.NET Programming with C# and SQL Server ...
Efficient Query Optimization for Distributed Join in Database
Efficient Query Optimization for Distributed Join in Database

... interest in the scientific community to allow disparate groups of researchers to share resources consisting of both data collections and programs [2, 3]. Also the World Wide Web is witnessing the need to deal with vast heterogeneous collections of data sources. Improving search by inter-operating am ...
Elmasri/Navathe, Fundamentals of Database Systems, Fourth Edition
Elmasri/Navathe, Fundamentals of Database Systems, Fourth Edition

...  Information stored in databases is known as structured data because it is represented in a strict format. The DBMS then checks to ensure that all data follows the structures and constraints specified in the schema.  In some applications, data is collected in an ad-hoc manner before it is known ho ...
Module 1 – Background - Dalhousie University
Module 1 – Background - Dalhousie University

... • Limitations of file-based systems include: – Separation and isolation of data • Application programs often access many files – Duplication of data • Data needed in several departments will be entered into each department’s system – Data dependence • Application programs need to be updated if file ...
Analysis and comparison of metabolic pathway databases
Analysis and comparison of metabolic pathway databases

... biochemical reactions within a single cell or a complete organism. There are different ways to show a graphical view of a pathway. Graphical representations of the pathways are drawn manually and are non-dynamic (KEGG, WIT) or are produced automatically on demand and are user-dependent (PathDB, EcoC ...
Modern Database Management, 10e (Hoffer/Ramesh/Topi)
Modern Database Management, 10e (Hoffer/Ramesh/Topi)

... Topic: Database Development Process AACSB: Analytic Skills 42) The traditional methodology used to develop, maintain and replace information systems is called the: A) Enterprise Resource Model B) Systems Development Life Cycle C) Unified Model D) Systems Deployment Life Cycle Answer: B Diff: 2 Page ...
Simple version control
Simple version control

SQL: Queries, Programming, Triggers
SQL: Queries, Programming, Triggers

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SQL Databases
SQL Databases

... Android Files Persistence is a strategy that allows the reusing of volatile objects and other data items by storing them Into a permanent storage system such as disk files and databases. File IO management in Android includes -among others- the familiar IO Java classes: Streams, Scanner, PrintWriter ...
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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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