• 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
Relational Algebra
Relational Algebra

... ◆ Deletes attributes that are not in projection list. ◆ Schema of result contains exactly the fields in the projection list, with the same names that they had in the (only) input relation. ◆ Projection operator has to eliminate duplicates! (Why??) – Note: real systems typically don’t do duplicate el ...
Oracle Database 10g: Administration Workshop I
Oracle Database 10g: Administration Workshop I

... 2. Transaction changes are stored in redo log files. 3. Tablespaces consist of one or more data files. 4. A data file can be used for more than one tablespace. 5. LogWriter (LGWR) writes redo log entries to the ...
Assessment Plan for the CS  Degree Program FY 2009-2010
Assessment Plan for the CS Degree Program FY 2009-2010

... (CO440.8)Develop and implement a system application project in an object-oriented programming language using traditional process model diagrams as a guide. CSCI 470 (CO470.1)Identify and explain the major components of the relational data model. (CO470.2)Utilize structured query language (SQL) to de ...
Reverse engineering of relational database applications
Reverse engineering of relational database applications

... Views thus obtained may serve various purposes. They may serve as a gradual migration mechanism to an OODBMS, storing new data in the object database, but obtaining old values from the legacy database; they may ease maintenance of the legacy database; they may encourage re-use of code by developing ...
Logical Database Layouts - University of South Alabama
Logical Database Layouts - University of South Alabama

... • At the highest level, it is designed to logically separate objects by object type and activity type. • It is the structure you get if you create a default database ...
Chapter 3 Effects of IT on Strategy and Competition
Chapter 3 Effects of IT on Strategy and Competition

... • 1NF and every non-key attribute is fully functionally dependent on the primary key. • Partial dependency must be eliminated – Break the composite primary key into two parts, each part representing a separate table – Every non-key attribute must be defined by the entire key (either a single PK or a ...
Lecture 29 - The University of Texas at Dallas
Lecture 29 - The University of Texas at Dallas

... management and regular change-ups. ...
A 3D geo database based on CityGML
A 3D geo database based on CityGML

SQL Views  Chapter 7 p. 260 -274 in Kroenke textbook
SQL Views Chapter 7 p. 260 -274 in Kroenke textbook

... SQL Views  SQL view is a virtual table that is constructed from other tables or views  It has no data of its own, but obtains data from tables or other views  It only has a definition  SELECT statements are used to define views  A view definition may not include an ORDER BY clause ...
Chapter 1
Chapter 1

... workgroups. • Microsoft Access tries to hide much of the underlying database technology from the user. • A good strategy for beginners, but not for database professionals. (missing some parts & PC based) • NOTE: Microsoft Access 2013 (2010) is discussed in detail in Appendix A. KROENKE AND AUER - DA ...
SQL Views  Chapter 7 p. 260 -274 in Kroenke textbook
SQL Views Chapter 7 p. 260 -274 in Kroenke textbook

... SQL Views  SQL view is a virtual table that is constructed from other tables or views  It has no data of its own, but obtains data from tables or other views  It only has a definition  SELECT statements are used to define views  A view definition may not include an ORDER BY clause ...
How Computer Viruses Work
How Computer Viruses Work

... Microsoft Word called VBA, or Visual Basic for Applications. It is a complete programming language and it can be programmed to do things like modify files and send e-mail messages. It also has a useful but dangerous auto-execute feature. A programmer can insert a program into a document that runs in ...
Challenging Ubiquitous Inverted Files
Challenging Ubiquitous Inverted Files

Presentation Guidelines
Presentation Guidelines

... • Must have Oracle 8i and higher Enterprise Edition Database. • Oracle no longer considers Enterprise User Security a separately licensable database option (in Oracle 8i and Oracle 9i Release 1 EUS was part of the Advanced Security Option. Starting with Oracle 9iRelease 2 EUS moves under the umbrell ...
Crystal Reports
Crystal Reports

codevoyeur.com
codevoyeur.com

... Coined in 1998 by Carlos Strozzi to describe a database that did not expose a SQL interface In 2008, Eric Evans reintroduced the term to describe the growing non-RDBMS movement Broadly refers to a set of data stores that do not use SQL or a relational model to store data Popularized by large web sit ...
NetPlus White Paper
NetPlus White Paper

PL/SQL Enhancements in Oracle Database 11g
PL/SQL Enhancements in Oracle Database 11g

... • OGC & ISO TC211 Enterprise Web Services Support • Meets requirements to provide spatial features as a service • Full transaction support for SOA architectures used by mapping agencies, energy, utilities, public sector ...
An Incremental Algorithm for Mining Privacy
An Incremental Algorithm for Mining Privacy

... performance will not be desirable.), because of this, randomization method is currently greatly applied to privacy preserving data mining [12, 13, 14, 15]. Randomization methods address the issue of privacy preserving by perturbing the data and reconstructing the distributions at an aggregate level ...
I Semester
I Semester

... 1. To understand the fundamentals of data models and conceptualize and depict a database , System using ER diagram 2. To make a study of SQL and relational database design. 3. To know about data storage techniques and query processing. 4. To impart knowledge in transaction processing, concurrency co ...
ACIDRain: Concurrency-Related Attacks on Database
ACIDRain: Concurrency-Related Attacks on Database

... manifest under the default isolation guarantees of popular transactional databases including Oracle 12c, and 17 vulnerabilities—due to incorrect transaction usage—manifest even under the strongest transactional guarantees offered by these databases. To begin, we define a threat model for ACIDRain at ...
Course Review
Course Review

... Intelligent Keys : have a meaning. Longitude and Latitude of an object (say a building) uniquely identifies a building and also nominates where it is. Super Key : This is normally a key with too many attributes in it. Some of the columns could be removed and a key would still exist. A good example i ...
Models of Software Evolution: Life Cycle Model
Models of Software Evolution: Life Cycle Model

... There are 3 types of application: ...
Relational Algebra
Relational Algebra

... Deletes attributes that are not in projection list. Schema of result contains exactly the fields in the projection list, with the same names that they had in the (only) input relation. Projection operator has to eliminate duplicates! (Why??)  Note: real systems typically don’t do duplicate eliminat ...
Document
Document

... procedure can be used over the network by multiple clients using different input data. A single remote message triggers the execution of a collection of stored SQL statements. The results are a reduction of network traffic and better performance. 17)What are the differences between stored procedures ...
< 1 ... 203 204 205 206 207 208 209 210 211 ... 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