• 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
How to Use the PowerPoint Template
How to Use the PowerPoint Template

Oracle AS
Oracle AS

Distributed Applications The NetBeans IDE
Distributed Applications The NetBeans IDE

Database Management System
Database Management System

... In the hierarchical model, data is organized as an inverted tree. Each entity has only one parent but can have several children. At the top of the hierarchy, there is one entity, which is called the root. ...
Introduction to XML
Introduction to XML

...  Bottom-level elements and attributes are mapped to attributes of relations  A relation is created for each element type  An id attribute to store a unique id for each element  all element attributes become relation attributes  All subelements that occur only once become attributes – For text-v ...
Developing Value from Oracle’s Audit Vault November 13, 2014
Developing Value from Oracle’s Audit Vault November 13, 2014

... With SAP version 7.10 above, the SAP user name is stored in the CLIENT_IDENTIFIER. When querying an Oracle database using OBIEE the connection pool username is passed to the database. To also pass the middle-tier username, set the user identifier on the session. Edit the RPD connection pool settings ...
Chapter 14: Query Optimization
Chapter 14: Query Optimization

... 2. Move selection operations down the query tree for the earliest possible execution (Equiv. rules 2, 7a, 7b, 11). 3. Execute first those selection and join operations that will produce the smallest relations (Equiv. rule 6). 4. Replace Cartesian product operations that are followed by a selection c ...
File Organization and Indexing
File Organization and Indexing

... Hash-based indexes only good for equality search. Sorted files and tree-based indexes best for range search; also good for equality search. (Files rarely kept sorted in practice; B+ tree index is better.) ...
XDAPrevalenceEnglish
XDAPrevalenceEnglish

... (All this operations are automatically realized by XDAGenerator) • Uses Borland code rules: – Declare attributes as private prefixing with “F” – Redeclare same attributes as published using property • Declare business methods as published • Declare a method published named PrimaryKey • Declare other ...
Consistency Rationing in the Cloud: Pay only when it matters
Consistency Rationing in the Cloud: Pay only when it matters

... container). Even for providers offering higher consistency guarantees, the question of cost remains as higher consistency means higher cost per transaction. ...
Oracle Database Appliance Sales Jarosław Skibiński
Oracle Database Appliance Sales Jarosław Skibiński

... such a great solution for you. You can reduce your annual OpEx by as much as $70K a year over similar solutions from HP and Dell, while benefitting from superior ease of management and single-vendor support. ...
IJCIS - Template Paper Title (14-Point Size, Times New Roman
IJCIS - Template Paper Title (14-Point Size, Times New Roman

... allows several methods to run concurrently within the same object. To handle this essential property of realtime database systems, we associate to each real-time object a local concurrency control mechanism, named local controller, which manages the concurrent execution of its methods. The local con ...
MCSE: Microsoft Certified Systems Engineer January
MCSE: Microsoft Certified Systems Engineer January

...  All tables indexed and tuned, then de-normalized when necessary to improve performance.  200 hand-programmed stored procedures, with parameters, RETURN values, complex multi-table JOINs, and cursors when necessary.  Performance tested and optimized using SQL Profiler, Index Tuning Wizard and Que ...
Aspnet3
Aspnet3

... recordset that can be bound to an output control. The recordset is empty because the SQL statement was in error or because no existing records matched the selection criteria. This situation may not cause a processing error, but you may not wish to display a partial or empty control where a recordset ...
Oracle Database 11g: 5 Essential Steps to Upgrade
Oracle Database 11g: 5 Essential Steps to Upgrade

emusst06 - Institut für Phonetik und Sprachverarbeitung
emusst06 - Institut für Phonetik und Sprachverarbeitung

... recent version, all time-dependent levels can be edited in Praat (Boersma and Weenink, 2001) and in WaveSurfer (Sjölander & Beskow, 2005) without losing the hierarchical structure of the EMU annotation. While WaveSurfer innately supports the label format produced by ESPS, Waves+ and EMU, for Praat ...
Database design theory, Part I
Database design theory, Part I

... Even once we have a set of attributes that uniquely identifies our tuple, the question remains whether that key is the only one possible for the relation. Suppose we had a more traditional student relation, which contained student UTorID, name, email address, and major. The attribute pair {UTorID, ...
Object Relational Databases
Object Relational Databases

... • Reuse comes from the ability to extend the database server so that core functionality is performed centrally, rather than coded in each application. • An example is a complex type (or extended base type) which is defined within the database, but is used by many applications. Previously it was requ ...
Best Practices for the SAS® Scoring Accelerator for DB2
Best Practices for the SAS® Scoring Accelerator for DB2

... database only after the data is extracted from the database and stored in a SAS Data Set. This means that data inside the DB2 database is duplicated outside the database (storage cost). Also, the network latency involved in moving large amounts of data delays the actual execution of a scoring model ...
Projects 1984 - Special Collections
Projects 1984 - Special Collections

Statistical Database
Statistical Database

ppt - Cern
ppt - Cern

... including high-level primitives for object sets and structures, while retaining compatibility with the SQL-92 SELECT syntax. ...
Incremental Update on Sequential Patterns in Large
Incremental Update on Sequential Patterns in Large

... sequences, not to mention the re-mining required when databases are updated or changed. Therefore, it is essential to investigate efficient algorithms for sequential pattern mining and effective approaches for sequential pattern updating. A sequential pattern is a relatively frequent sequence of tra ...
SQL Server Developer
SQL Server Developer

... ❏ Interacting with Business Analysts & Developers in identifying the business requirements, designing & implementing the database schema. ❏ Developed a data model and implemented the same using ERWIN. ❏ Created Tables, Views, Triggers, Stored Procedures, User Defined Functions and other T-SQL (DDL, ...
ExpertSeminar_AnalyticsPerformance(May 26 2010)
ExpertSeminar_AnalyticsPerformance(May 26 2010)

... Answer ID #2776 “Common questions regarding queued reports” Answer ID #2149 “Receiving a message “Query processes too much data” Answer ID #2223 “Analytics Error: Data Set has exceeded maximum size” Answer ID #1266 “Impact of indexing a custom field” Answer ID #1839 “Types of table joins used with r ...
< 1 ... 109 110 111 112 113 114 115 116 117 ... 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