|
| |
| | Relational database - Wikipedia, the free encyclopedia |
 | | A relational database is a database structured in accordance with the relational model. | | | Because of their algebraic properties these operations are often used in database query optimization as an intermediate representation of a query to which certain rewrite rules can be applied to obtain a more efficient version of the query. | | | The relational algebra is complete with respect to first-order predicate calculus except that restrictions are imposed on the use of the logical operations of negation and disjunction in order to guarantee that database computations will be feasible in practice. |
|
http://en.wikipedia.org/wiki/Relational_database
(577 words)
|
|
| |
| | Relational model - Wikipedia, the free encyclopedia |
| | A relation schema (H, C) consists of a header H and a predicate C(R) that is defined for all relations R with header H. | | | In accordance with this Principle, a relational database is a set of relvars and the result of every query is presented as a relation. | | | Usually in the relational model a database schema is said to consist of a set of relation names, the headers that are associated with these names and the constraints that should hold for every instance of the database schema. |
|
http://en.wikipedia.org/wiki/Relational_model
(2799 words)
|
|
| |
| | Howstuffworks "What are relational databases?" |
| | Relational databases are created using a special programming language, structured query language (SQL), that is the standard for database interoperability. | | | Databases have been a staple of business computing from the very beginning of the digital era. | | | In fact, the relational database was born in 1970 when E.F. Codd, a researcher at IBM, wrote a paper outlining the process. |
|
http://computer.howstuffworks.com/question599.htm
(479 words)
|
|
| |
| | The CTDP Basic Database Guide - RDBMS Definition |
| | Relational database servers use Structured Query Language (SQL), as a data manipulation language to interface between itself and the clients. | | | Relational databases store data in tables (relations) that are two dimensional. | | | A relational database can be a file with sets of tables. |
|
http://www.comptechdoc.org/independent/database/basicdb/datardbms.html
(576 words)
|
|
| |
| | Relational database management system - Wikipedia, the free encyclopedia |
| | A second, theory-based school of thought argues that if a database does not implement all of Codd's rules (or the current understanding on the relational model, as expressed by Christopher J Date, Hugh Darwen and others), it is not relational. | | | One well-known definition of what constitutes a relational database system is Codd's 12 rules. | | | presented the data to the user as relations (a presentation in tabular form, i.e. |
|
http://en.wikipedia.org/wiki/Relational_database_management_system
(493 words)
|
|
| |
| | Chapter 6: The Rise of Relational Databases Funding a Revolution: Government Support for Computing Research |
| | Today, relational databases are but one way of accessing the multiple types of information computers can handle. | | | The term "database" emerged to capture the sense that the information stored within a computer could be conceptualized, structured, and manipulated independently of the specific machine on which it resided. | | | For instance, although the relational model was originally proposed and developed at IBM, it was a government-funded effort at the University of California at Berkeley (UC-Berkeley) that disseminated the idea widely and gave it the intellectual legitimacy required for broad acceptance and commercialization. |
|
http://www.nap.edu/readingroom/books/far/ch6.html
(3609 words)
|
|
| |
| | oreilly.com -- Online Catalog: Database in Depth |
| | Database In Depth is even better than I expected, since he incorporated concepts from Third Manifesto as well. | | | This book sheds light on the principles behind the relational model, which is fundamental to all database-backed applications--and, consequently, most of the work that goes on in the computing world today. | | | Database in Depth will appeal not only to database developers and designers, but also to a diverse field of professionals and academics, including database administrators (DBAs), information modelers, database consultants, and more. |
|
http://www.oreilly.com/catalog/databaseid
(955 words)
|
|
| |
| | Fundamentals of Relational Database Design -- r937.com |
| | Database design theory is a topic that many people avoid learning for lack of time. | | | The basic idea behind the relational model is that a database consists of a series of unordered tables (or relations) that can be manipulated using non-procedural operations that return tables. | | | But if creating databases is part of your job, then you're treading on thin ice if you don't have a good solid understanding of relational database design theory. |
|
http://r937.com/relational.html
(6723 words)
|
|
| |
| | Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. |
| | A major benefit of this approach is the unification of the application and database development into a seamless data model and language environment. | | | In such database there is no clear separation between the data and the schema, and the degree to which it is structured depends on the application. | | | In contrast to a relational DBMS where a complex data structure must be flattened out to fit into tables or joined together from those tables to form the in-memory structure, object DBMSs have no performance overhead to store or retrieve a web or hierarchy of interrelated objects. |
|
http://unixspace.com/context/databases.html
(2376 words)
|
|
| |
| | Web Application Development, Winter 2006 |
| | Logically, relational databases lend themselves very efficiently to many situations, and because their structure is transparent, they can be designed and modified relatively easily. | | | If, when a relational database is created, the RDBMS is notified which fields in which tables are primary keys and which fields in which tables they then appear in as foreign keys (i.e. | | | The most important, and arguably the hardest, part of building a database is figuring out, exactly, what data need to be included, how they should be organized, and how they inter-relate, then crafting a design around those data that efficiently solves the problem for which the database was initially conceived. |
|
http://gradcenter.marlboro.edu/~iank/wad/2
(2940 words)
|
|
| |
| | Relational Database Design - Course 382 |
| | To efficiently use a database, knowledge of the architecture and of the SQL programming language is essential. | | | This course provides a comprehensive foundation for designing, building, and working with relational databases, enabling you to understand and participate in the development process and use a relational database effectively. | | | This course is valuable for anyone involved in building and using relational databases and implementing database applications. |
|
http://www.learningtree.com/courses/382.htm
(442 words)
|
|
| |
| | RFC 1697 (rfc1697) - Relational Database Management System (RDBMS) Managem |
| | Whether a particular database is represented by a row in rdbmsDbTable may be dependent on the activity level of that database, according to the product's implementation. | | | Note: if there is no server associated with this database, an agent may need to keep this in other persistent storage, e.g., a configuration file. | | | In the MIB, data about databases is captured in the rdbmsDbTable and the rdbmsDbInfoTable, each with one row per database. |
|
http://www.faqs.org/rfcs/rfc1697.html
(4097 words)
|
|
| |
| | Dilip's Brief Introduction to Relational Databases |
| | We looked at the set theoretic relational algebra that relational databases are based on, and considered the high-level SQL language for users to declaratively specify queries to retrieve information from databases. | | | The Relational Calculus is a formal query language. | | | Though it is important to have some basic understanding of the relational algebra, in practice most users take advantage of a higher level language for retrieving information from a database, and we look at SQL (Structured Query Language) as a common example. |
|
http://www.cs.unc.edu/Courses/wwwp-s98/members/barman/databaseLesson
(2870 words)
|
|
| |
| | 15 Seconds : Introduction to Relational Databases - Part 1: Theoretical Foundation |
| | The database description is represented at the logical level in the same way as ordinary data, so authorized users can apply the same relational language to its interrogation as they apply to regular data. | | | The concept of relational databases was first described by Edgar Frank Codd (almost exclusively referenced as E. Codd in technical literature) in the IBM research report RJ599, dated August 19th, 1969. | | | The data manipulation sublanguage of a relational DBMS must enable application programs and terminal activities to remain logically unimpaired whether and whenever data are physically centralized or distributed. |
|
http://www.15seconds.com/issue/020522.htm
(3641 words)
|
|
| |
| | Your First Database |
| | Even experienced database administrators have been known to discover, halfway into a project, that their data design is flawed and they have no choice but to throw out all the code they've written so far and start from scratch. | | | You need the practice because relational database design is difficult conceptually and even harder practically. | | | As you tackle your first database, be prepared to make some mistakes. |
|
http://www.webmonkey.com/99/13/index1a.html
(320 words)
|
|
| |
| | XQuery in Relational Database Systems |
| | The resulting algebra tree is grafted into the algebra tree of the relational expression so that in the end, the query execution engine will receive a single execution tree that it will optimize and execute. | | | First generation XML support in relational database systems mainly concerned themselves with exporting relational data as XML, where the markup was communicating structural and semantic information, and to import relational data in XML markup form back into a relational representation. | | | One of the main strengths of integrating XML into a relational database system is its integration with the relational model and mature database management functionality. |
|
http://www.idealliance.org/proceedings/xml04/papers/254/XQueryRDS.html
(3594 words)
|
|
| |
| | Firebird - Relational Database for the New Millenium |
| | Firebird is a relational database offering many ANSI SQL standard features that runs on Linux, Windows, and a variety of Unix platforms. | | | Firebird is a commercially independent project of C and C++ programmers, technical advisors and supporters developing and enhancing a multi-platform relational database management system based on the source code released by Inprise Corp (now known as Borland Software Corp) on 25 July, 2000 under the InterBase Public License v.1.0. | | | Firebird - Relational Database for the New Millenium |
|
http://firebird.sourceforge.net
(529 words)
|
|
| |
| | What is database? - A Word Definition From the Webopedia Computer Dictionary |
| | In a Hypertext database, any object, whether it be a piece of text, a picture, or a film, can be linked to any other object. | | | Hypertext databases are particularly useful for organizing large amounts of disparate information, but they are not designed for numerical analysis. | | | You can think of a database as an electronic filing system. |
|
http://www.webopedia.com/TERM/d/database.html
(492 words)
|
|
| |
| | Java Skyline: Database |
| | Defines a style of DDL where database objects all have object IDs and there is a Factory classes structure that store/restore information to/from database. | | | Generally, access to relational data is based on SQL (Structured Query Language). | | | JCDatabase is a simple relational database server and interface that you can use from Java. |
|
http://www.javaskyline.com/database.html
(2410 words)
|
|
| |
| | Jan's Computer Basics:2-4 Databases |
| | Both spreadsheets and databases can be used to handle much the same information, but each is optimized to handle a different type most efficiently. | | | database is a collection of data that you want to manage, rearrange, and add to later. | | | This kind of database uses a set of tables which are linked together. |
|
http://www.jegsworks.com/Lessons/lesson1-2/lesson2-4database.htm
(760 words)
|
|
| |
| | RDBMS - Relational Database Management Systems |
| | Some databases are little more than a light layer of syntactic frosting on top of a flat file storage system. | | | This page is devoted to information about relational database systems, primarily dealing with those database systems available under | | | When you are considering which database you might wish to use, it would be worth looking at the essay |
|
http://www.cbbrowne.com/info/rdbms.html
(568 words)
|
|
| |
| | Duro - open-source relational database library |
| | The goal of the Duro project is to create a library which is as compliant with the proposed database language D as it is possible for a C library. | | | This library is supposed to serve as a basis for a truly relational database management system (TRDBMS). | | | Tcl interface, including support for relational expressions in Tutorial D syntax and operators implemented in Tcl ("stored procedures"). |
|
http://duro.sourceforge.net
(186 words)
|
|
| |
| | WDVL: Relational Databases |
| | In other words, a user can query information concerning table names, access rights, or some data and the results of these queries would then be presented to the user in the form of a table. | | | This means that many relational systems can use operations recursively in order to provide information about the database. | | | This is probably the main reason for the popularity of relational database systems today. |
|
http://wdvl.com/Authoring/DB/Intro/relational_databases.html
(649 words)
|
|
| |
| | The MySQL Relational database - training course |
| | The database engine does all the hard work of storing and formatting the data for you - all you have to do is program the engine using the SQL language. | | | Those tables can "relate" to each other, allowing a complex data set to be stored, and complex searches made. | | | Disk structure of data held in a MySQL database. |
|
http://www.wellho.net/course/mqfull.html
(793 words)
|
|
| |
| | Troels' links: Relational database systems |
| | Mackey has also co-written a related slide-set about relational databases, aimed at biologists. | | | Daniel Aioanei and Adi Malinaru: General trees persisted in relational databases. | | | Lennart Jonsson: Representing Trees in a relational DB (materialized path, transitive closure tables). |
|
http://troels.arvin.dk/db/rdbms/links
(1924 words)
|
|
| |
| | Java Database |
| | The use of Java objects, from simple to complex, in the database provides application developers with maximum flexibility by opening infinite possibilities for information storage and manipulation. | | | A change to the object does not require a change to the database structure. | | | FirstSQL maintains a performance lead in OLTP, business intelligence and embedded database systems by providing a highly optimized query engine with traditional Disk access mode or In-Memory mode for ultra-high speed direct access. |
|
http://www.firstsql.com
(799 words)
|
|
| |
| | Object Database vs. Object-Relational Databases |
| | The ORDBMS technology is compared with the relational databases from which ORDBMS is evolving and with the pure object databases that they will never replace. | | | It includes a summary of 1996, when a trend toward multimedia-type database product rollouts and a new extended version of relational database technology emerged dubbed the "object relational" database management system (ORDBMS). | | | This bulletin discusses the intense changes and innovations currently shaping database technology and related products. |
|
http://www.ca.com/products/jasmine/analyst/idc/14821Eat.htm
(231 words)
|
|
| |
| | Amazon.com: Handbook of Relational Database Design: Books: Candace C. Fleming,Barbara von Halle |
| | The design methodologies are independent of product-specific implementations and have been applied to numerous relational product environments. | | | Database Modeling and Design: Logical Design, 4th Edition (The Morgan Kaufmann Series in Data Management Systems) by Toby J. Teorey | | | Information Modeling and Relational Databases: From Conceptual Analysis to Logical Design (The Morgan Kaufmann Series in Data Management Systems) by Terry Halpin |
|
http://www.amazon.com/exec/obidos/tg/detail/-/0201114348?v=glance
(1158 words)
|
|
| |
| | (*) MindModel - Relational database design software. Access your data from your PC, LAN or Web. |
| | MindModel is very easy-to-use relational database software that allows you to store and recall information on any topic. | | | Use it to create databases of people, companies, products, ideas, or anything else, all without programming. | | | If you've got a database project, but don't have the time, money, or skills to get it done, you need MindModel. |
|
http://www.mindmodel.com
(333 words)
|
|
| |
| | Windows Database Service: Introduction to Data Modeling |
| | The document is a practical guide, not an academic paper on either relational database design or data modeling. | | | This document is an informal introduction to data modeling using the Entity-Relationship (ER) approach. | | | The basic techniques described are applicable to the development of microcomputer based relational database applications as well as those who use relational database servers such as MS SQL Server or Oracle. |
|
http://www.utexas.edu/its/windows/database/datamodeling
(141 words)
|
|
| |
| | Relational Database Design |
| | The goal of relational database design is to generate a set of schemas that allow us to | | | Alternative Approaches to Database Design (not to be covered) | | | Normalization Using Multivalued Dependencies (not to be covered) |
|
http://www.cs.sfu.ca/CC/354/zaiane/material/notes/Chapter7/node1.html
(50 words)
|
|
| |
| | Relational Database |
| | In addition, the CandC Reservoirs Relational Database incorporates a comprehensive classification scheme for depositional systems, environmental types, basin types, structural settings, trapping mechanisms and fractured reservoir types. | | | The geologic and reservoir engineering data in the original field-specific reservoir evaluation reports have been standardized, updated and incorporated into the CandC Reservoirs DIGITAL ANALOGS Relational Database Management System. | | | The relational database model consists of two subsystems: a Field Information Subsystem with more than 50 parameters and a Reservoir Information Subsystem with more than 170 parameters. |
|
http://www.ccreservoirs.com/DigitalAnalogs/relationaldatabase.htm
(127 words)
|
|
| |
| | ON THE RELATIONAL MODEL, DATABASE, AND DBMS WIKIPEDIA ENTRIES |
| | As for the entry for relational model, I think it needs to be changed to say that the first implementation was PRTV (ISBL), not the Multics thing. | | | Thanks for your Database Debunkings website in general, by the way. | | | Note that there are some differences between Date and Darwen's interpretation of Codd's relational model, and David McGoveran's and mine. |
|
http://www.dbdebunk.com/page/page/2434346.htm
(366 words)
|
|
| |
| | InterSystems Caché: Post-relational Database |
| | CACHÉ is a multidimensional database that uniquely combines robust objects and robust SQL, thus eliminating object-relational mapping. | | | Analyst Whitepaper - The Failure of Relational Database, The Rise of Object Technology, The Need for the Hybrid Databases | | | IDC Analysis - Caché is ranked as the fastest growing embedded database among leading vendors(.pdf format) |
|
http://www.intersystems.com/cache
(165 words)
|
|
| |
| | Relational Database Design - Structures and Terminology |
| | Data Definition Language (DDL) and Data Manipulation Language (DML), An introduction to SQL, Using SQL to build a relational database. | | | ODBC/JDBC, COM and CORBA - mechanisms for transparent connections to the database. | | | The term database is variously spelt database or data base or data-base. |
|
http://www.pathology.ufl.edu/~computer/training/rdb_course
(356 words)
|
|
| |
| | Your First Database |
| | Since you may not be in a position to drop $30K on the high-end RDBMSes (relational database management systems) that these sites employ, Jay starts the tutorial by explaining how you can use the tools you already have to create a smaller, yet still useful, database application. | | | Professional database folk would like you to think that building a Web-based relational database application is water-to-wine difficult. | | | Some of the most useful sites out there - the Internet Movie Database, Monster.com, and Amazon.com - have a relational database to thank for their success. |
|
http://www.webmonkey.com/backend/databases/tutorials/tutorial3.html
(249 words)
|
|
| |
| | GadflyB5: SQL Relational Database in Python |
| | Gadfly is a simple relational database system implemented in Python based on the SQL Structured Query Language. | | | Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appears in all copies and that both that copyright notice and this permission notice appear in supporting documentation. | | | The package requires installation before use, please see the section on installation. |
|
http://gadfly.sourceforge.net
(235 words)
|
|
| |
| | [No title] |
| | Advantage Database Server is a full-featured, high performance client/server data management system for stand-alone, networked, internet, and mobile database applications. | | | For those wanting an affordable database solution without sacrificing functionality, Advantage provides the database functionality developers require without the high ownership costs of other database products. | | | Advantage is specifically designed to meet the needs of business application developers and allows developers to easily deploy robust applications with complete control of data integrity, multi-user concurrency, and data security. |
|
http://www.advantagedatabase.com
(228 words)
|
|
| |
| | DIII-D Relational Database |
| | Feel free to send any questions, suggestions, comments, or concerns about this web page and the D3DRDB database to Justin Burruss (burruss@fusion.gat.com). |
|
http://d3dnff.gat.com/D3DRDB
(22 words)
|
|
|
