• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Unit - III
Unit - III

... said to commit if all changes can be made successfully to database and to abort if cancelled. This ability of transactions ensures atomicity of change that maintain the database in a consistent state o Concurrency Policy: The most conservative way to enforce serialization is to allow a user to lock ...
semester v cm06bba02 – database management system for business
semester v cm06bba02 – database management system for business

... C) Queries D) All of the above 20. In an ER model, ……………. is described in the database by storing its data. A) Entity B) Attribute C) Relationship D) Notation 21. A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Sch ...
Fast Numerical Computations on Large Integer Databases using
Fast Numerical Computations on Large Integer Databases using

... • Rendering single 1000x1000 quad takes 0.278ms • Rendering 19 such quads take 5.28ms. Observed time is 6.6ms ...
DAT317 Database Schema Versioning: How to Use Microsoft Visual
DAT317 Database Schema Versioning: How to Use Microsoft Visual

... Generate Meaningful Data Values through the ability to import information such as Row Counts and histograms from a real database Data Generator provides Repetitive Dataset Generation for tests based on saved settings ...
Database Operations
Database Operations

... • Rendering single 1000x1000 quad takes 0.278ms • Rendering 19 such quads take 5.28ms. Observed time is 6.6ms ...
Chapter 1: Introduction
Chapter 1: Introduction

...  Triggers cannot be used to directly implement external-world actions, BUT ...
Seminar 5: OO Database Design
Seminar 5: OO Database Design

... notations stand for and how they are mapped onto relational model. The UML conceptual model is provided to give you an idea of how the relational model came into existence in the first place. Complete implementation of the UML class diagram as an OO schema using ODL. A start-up schema (seminar6.odl) ...
Relational-Database Design - Department of Computer Science
Relational-Database Design - Department of Computer Science

...  the programmer can work only with objects – no SQL statements in the code  selected objects are initially marked as being persistent – thereafter, changes in those objects are transparently changed in the database, and the programmer does not have to write code specifically to update the database ...
Chapter 23: Advanced Data Types and New Applications
Chapter 23: Advanced Data Types and New Applications

...  Deletion of an entry in an R-tree done much like a B+-tree deletion. ...
SQLite and Android Tutorial
SQLite and Android Tutorial

... Deferred means that no locks are acquired on the database until the database is first accessed. Thus with a deferred transaction, the BEGIN statement itself does nothing to the filesystem. Locks are not acquired until the first read or write operation. The first read operation against a database cre ...
5 - Elte
5 - Elte

... • Start and stop iSQL*Plus • Start and stop Enterprise Manager Database Control • Start and stop the Oracle Listener • Start up and shut down Oracle Database 10g ...
Principles of database performance tuning
Principles of database performance tuning

... more expensive then sending 1 byte packet or reading one block takes more or less the same time as reading entire cylinder ...
Database
Database

... sophisticated analyses that provide business intelligence ...
Pass4sure 1z0
Pass4sure 1z0

... NEWNAME command within the RMAN RUN block. A is incorrect because no data dictionary view called DBA_DATAFILE exists, and even if it did exist, the view would not be available when the database is in the MOUNT state. B, D, and E arencorrect because these views do not contain information about datafi ...
Chap13 Presentation
Chap13 Presentation

... Collection of data organized so you can access, retrieve, and use it  Database software allows you to • Create database • Add, change, and delete data • Sort and query database  Database software also is called database management system (DBMS) Next p. 13.2 ...
as PDF - Unit Guide
as PDF - Unit Guide

... No extensions will be granted. Students who have not submitted an assessment task prior to the deadline will be awarded a mark of 0 for the task, except for cases in which an application for special consideration for that task is made and approved. SPECIAL CONSIDERATION Special Consideration is inte ...
ALGRES: An Extended Relational Database - CEUR
ALGRES: An Extended Relational Database - CEUR

MCDB: T M C D
MCDB: T M C D

... • Compiles queries to MapReduce jobs, run on Hadoop — So it scales to very large data sizes — Maybe not well, but it scales! ...
the first slide here (usecases)
the first slide here (usecases)

... Adding, deleting, modifying can be done using a UI but anyway it’s Executed Through the query system which also give the user the ability to retrieve info The diagrams are not relative to a specific database management system ...
Chapter 1: Introduction - CS-People by full name
Chapter 1: Introduction - CS-People by full name

... “Data is the primary and integral part of information industry. Proper management of the data using database technology is essential ...
Why Scientists Don`t Use Databases
Why Scientists Don`t Use Databases

... 8) Database data types are business - not science - oriented. It is true that conventional DBMS data types (character, packed decimal scalar types) are not oriented to science applications. In recent years, however, most DBMSs have added floating point support as well as more complex general data ty ...
SQL
SQL

... ISO Standard for database management. Allows creation, alteration, and querying of databases. ...
SQL
SQL

... ISO Standard for database management. Allows creation, alteration, and querying of databases. ...
High-Quality Code - Unit Testing
High-Quality Code - Unit Testing

Corporate PPT Template
Corporate PPT Template

...  A whole new set of books possible for DBA’s managing “small to medium size” databases ...
< 1 ... 268 269 270 271 272 273 274 275 276 ... 459 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report