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original
original

...  The task of authorization in above cases falls on the application program, with no support from SQL  Benefit: fine grained authorizations, such as to individual tuples, can be implemented by the application.  Drawback: Authorization must be done in application code, and may be dispersed all over ...
Slide 5-9
Slide 5-9

... Important distinction between SQL and the formal relational model; SQL allows a table (relation) to have two or more tuples that are identical in all their attribute values Hence, an SQL relation (table) is a multi-set (sometimes called a bag) of tuples; it is not a set of tuples SQL relations can b ...
QuantaBase.1.0.v1.RE..
QuantaBase.1.0.v1.RE..

... About QuantaBase QuantaBase is a database access and reporting application. It can be used for both data entry and to create multipage reports using multiple databases. It is build around a client/server architecture (multiuser & multiserver) and in its standard form uses QuantaServer, (also used i ...
transparently - Indico
transparently - Indico

... Set up the POOL database according to the directives specified by the user (technology, containers, mapping) ‘Soft’ import: configure and update POOL internals to populate pool ...
Document
Document

... every atomic protocol may cause processes to become blocked. Two exceptions: if we ignore communication failures, it is possible to design such a protocol (Skeen et. al. 83) If we impose some restrictions on transactions (I.e., what data they can read/write) such a protocol can also be designed (Meh ...
Project logo (optional)
Project logo (optional)

... The project data explorer is a prototype visualiser. The explorer provides three windows, one each for listing projects, jobs and facts. The “projects” window lists the names and start dates for all projects in the database. The user can select one of the projects, and the list of associated jobs (n ...
MMDB Final Report. - VTechWorks
MMDB Final Report. - VTechWorks

... both undergraduate and graduate Computer Science students at Virginia Tech can upload their personal projects for all instructors who are affiliated with the university to view. The overall goal of this project was to create a system to allow a user a way to view other user's profiles in order to fa ...
Document
Document

... • Numerous constraints: – Available funding – Management’s view of the role played by an IS department and of the extent and depth of the information requirements – Corporate culture ...
ARB: a software environment for sequence data
ARB: a software environment for sequence data

... As mentioned in the Materials and Methods section, software implementations of several alternative treeing methods are incorporated in the package. They operate as intrinsic tools with all the respective ARB components and database elements such as alignment and filters. The central treeing tool of ...
Unit 3- Database Connectivity A database is an organized collection
Unit 3- Database Connectivity A database is an organized collection

... You access the data in a ResultSet object through a cursor. Note that this cursor is not a database cursor. This cursor is a pointer that points to one row of data in the ResultSet. Initially, the cursor is positioned before the first row. The method ResultSet.next moves the cursor to the next row. ...
Backup tables
Backup tables

VisTool: a Visual Tool for Querying Relational Databases
VisTool: a Visual Tool for Querying Relational Databases

Visual Basic 6 Database Programming Bible
Visual Basic 6 Database Programming Bible

1-Witch of the following statements about shared servers are true
1-Witch of the following statements about shared servers are true

A primary key
A primary key

... Create supporting structures Read database data Modify database data (insert, update, delete) Maintain database structures Enforce rules i.e., Referential Integrity Constraints Control concurrency Provide security Perform backup and recovery ...
goel /Thesis/Presentation - Computer Science & Engineering
goel /Thesis/Presentation - Computer Science & Engineering

... Experiment on AR database using closest match approach + scoring, training set consists of random subjects as in the gallery and Test set contains different combinations. ...
ch26
ch26

...  Activation of triggers cannot be easily undone in event of abort or rollback. ...
Distributed Databases
Distributed Databases

... different database management systems. A distributed database can possibly be defined to provide functionality that cuts across the separate applications. • Database recovery Replicating data on separate computers is one strategy for ensuring that a damaged database can be quickly recovered and user ...
Table of Contents
Table of Contents

Chapter VIII data and database Information security
Chapter VIII data and database Information security

... designed carefully to make it user friendly as much as possible. Forms must be: • Fields arranged in a logical order • Boxes areas should be clear, visible and consistent with data to fill • Provide easy samples with instructions about the filling of data. ...
Lecture 0 - School of Computing
Lecture 0 - School of Computing

...  This course focuses on the use of database management systems (DBMS) to store spatial information. A spatially enabled DBMS is a central component of a Geographical Information System (GIS). GIS has a major role to play in managing the national physical and informational infrastructure. An underst ...
PDF Version
PDF Version

comp14_unit5_audio_transcript
comp14_unit5_audio_transcript

... Most EHRs provide basic auditing capabilities that allow administrators to see who viewed or edited information in a patient’s chart. Audit logs are beneficial for enhancing information security, but if architected correctly, they can also provide data about system use. For example, a healthcare org ...
Storage - CS-People by full name
Storage - CS-People by full name

... Storage Media: Players  Optical storage  non-volatile, data is read optically from a spinning disk using a laser  CD-ROM (640 MB) and DVD (4.7 to 17 GB) most popular forms  Write-one, read-many (WORM) optical disks used for archival storage (CD-R and DVD-R)  Multiple write versions also availa ...
An example to insert some data in to the MySQL database
An example to insert some data in to the MySQL database

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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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