• 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
Bachelor’s Thesis (TUAS) Degree Program: Information Technology Specialization: Internet Technology
Bachelor’s Thesis (TUAS) Degree Program: Information Technology Specialization: Internet Technology

... has led to this growth. With smartphones being able to process many applications simultaneously, a majority or rather all mobile applications have an underlying database to store the required information. Consumers are not limited to any mobile device in the market hence most applications can be dev ...
Teradata RDBMS SQL Reference Volume 1
Teradata RDBMS SQL Reference Volume 1

Java DB Reference Manual Version 10.5 Derby Document build:
Java DB Reference Manual Version 10.5 Derby Document build:

Building Large-Scale eCommerce Platforms
Building Large-Scale eCommerce Platforms

... Remember that some shared resources (especially legacy systems) are not at all scalable beyond a certain point or are prohibitively expensive and/or time-consuming to scale. Scaling for only essential processing helps prevent the need to scale those systems. The second problem with synchronous proce ...
SETL An ETL Tool
SETL An ETL Tool

... ●From a high level, data marts are highly similar (Staging, dimension, fact, reference tables, …) ●From a high level, ETL jobs are highly similar (Extract, transform, load, log, …) ●Cookie cutters are great for rapidly creating highly similar cookies ●Software tools are great for rapidly creating hi ...
CMU SCS 15-415/615 :: Introduction - CMU-CS 15
CMU SCS 15-415/615 :: Introduction - CMU-CS 15

... applications to store and analyze information in a database. • A general-purpose DBMS is designed to allow the definition, creation, querying, update, and administration of databases. ...
Introduction to MS Query - Hutchins Central
Introduction to MS Query - Hutchins Central

... A view can be considered to be a super table that combines multiple base tables into one big table. The information in these views is from individual fields and from generated fields. Generated fields can be from more base tables that have been combined and manipulated to form more fields. These can ...
CodeCharge Studio - Introductory Tutorial
CodeCharge Studio - Introductory Tutorial

Versata Business Logic Designer Tutorial
Versata Business Logic Designer Tutorial

... TRANSACTION. Represents an instance where a set of a particular stock’s shares are bought or sold. TRANSTYPE. Represents valid types of transactions, defined as buy and sell. Serves as a value table. (Note that you will need to populate this table with data as part of setup, so that this data can be ...
13. Tamino XMLDB
13. Tamino XMLDB

... as XML documents. The simplest case will be retrieving an object stored natively as XML. In more complex cases, communication with X-Node and X-Tension is required to compose an XML object from non-XML data sources. ...
Enterprise eTIME Database Administrator`s Guide
Enterprise eTIME Database Administrator`s Guide

1 Oblivious Bounds on the Probability of Boolean Functions WOLFGANG GATTERBAUER DAN SUCIU
1 Oblivious Bounds on the Probability of Boolean Functions WOLFGANG GATTERBAUER DAN SUCIU

... Thus, model-based lower bounds for conjunctive expressions are not optimal and can always be improved by using dissociation. Our dual result states the following for the case when the two formulas are connected with disjunction ∨ instead of conjunction ∧: (1) the dissociation is an upper bound iff p ...
shellscript oracle
shellscript oracle

... Each of these fields can contain a single number, a range of numbers indicated with a hyphen (such as 24), a list of specific values separated by commas (like 2,3,4) or a combination of these designations separated by commas (such as 1,3-5). Any of these fields may also contain an asterisk (*) indic ...
Method and system for using fine-grained access control (FGAC) to
Method and system for using fine-grained access control (FGAC) to

... table and this class cannot be dropped or modi?ed in any Way. The default user authorization class is provided as a location for any authorizations for Which no authorization class is speci?ed (i.e. it is a convenience to alloW for authorizations to ...
Firebird 3.0.2 Release Notes
Firebird 3.0.2 Release Notes

... Alter the Default Character Set ............................................................................................. BLOB Expressions in Computed Columns ............................................................................ “Linger” Database Closure for Superserver .................. ...
Application Express in Oracle Database 12c Multitenant Architecture
Application Express in Oracle Database 12c Multitenant Architecture

... Copyright © 2013, Oracle and/or its affiliates. All rights reserved. ...
Sedna Programmer`s Guide
Sedna Programmer`s Guide

... libsedna is the C application programmer’s interface to Sedna XML DBMS. libsedna is a set of library functions that allow client programs to access one or more databases of Sedna XML DBMS and manipulate database data using database language (XQuery and XUpdate) described in Section 2. libsedna libra ...
Building and Configuring Slony
Building and Configuring Slony

... changes in scripts. Tracking your schema changes in scripts is a key DBA procedure for keeping your system in order and your database recreatable. The first part of Slony-I also does not address any of the user interface features required to set up and configure the system. After the core engine of ...
ER/Studio Team Server XE7 - Embarcadero Technologies Product
ER/Studio Team Server XE7 - Embarcadero Technologies Product

... 2 Optional. If you want users to be able to send results of searches and reports to an email address, click Enable sending of Email. Additional fields appear on this page of the installer where you must specify the details of your email server and any authentication required. Installation Wizard - H ...
GIS User Needs Assesment-CEAI-Final
GIS User Needs Assesment-CEAI-Final

... 5. Concurrent license of ArcGIS Desktop (license key should have arrived in Maputo) 6. Antivirus software, malware, firewall In addition, there is a need to recommend and agree upon a database structure, so that all are in agreement with where data should be stored in the master database 1a. Hardwar ...
Derby Tools and Utilities Guide Version 10.13 Derby Document build:
Derby Tools and Utilities Guide Version 10.13 Derby Document build:

... "Source" form shall mean the preferred form for making modifications, including but not limited to software source code, documentation source, and configuration files. "Object" form shall mean any form resulting from mechanical transformation or translation of a Source form, including but not limite ...
Greenplum Database 4.3.0.0 Release Notes
Greenplum Database 4.3.0.0 Release Notes

... capacity from table data that was deleted or updated. For information about the changes to the utilities, and views and tables, see Changed and Deprecated Features. For information about the new server configuration parameters, see Server ...
The Ciao system 7 - Datu bāzes tehnoloģijas
The Ciao system 7 - Datu bāzes tehnoloģijas

... well-known Prolog systems. In fact, the current version of YAP performs better than the original one, written in assembly language. Robustness: We have tested the system with a large array of Prolog applications. Extensibility: YAP was designed internally from the beginning to encapsulate manipulati ...
Auditing Oracle with Quest InTrust 10.3
Auditing Oracle with Quest InTrust 10.3

Oracle DBA Checklists
Oracle DBA Checklists

< 1 ... 33 34 35 36 37 38 39 40 41 ... 690 >

Relational model



The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report