Database refimprove date December 2011 condense date November 2011 A database is an organized ... processes requiring this information for example, finding a hotel with vacancies . The term database is correctly applied to the data and their supporting data structures, and not to the database management system DBMS . The database data collection with DBMS is called a database system . The term database system implies that the data is managed to some level of quality measured in terms of accuracy ... database management system DBMS . ref name Ullman Jeffrey Ullman and Jennifer widom 1997 First course in database systems , Prentice Hall Inc., Simon & Schuster, Page 1, ISBN 0 13 861337 0. ref A general .... Well known DBMSs include Oracle Database Oracle , IBM DB2 , Microsoft SQL Server , Microsoft Access , PostgreSQL , MySQL , and SQLite . A database is not generally Software portability portable ... database bibliographic , document text, statistical, or multimedia objects. Another way is by their application ..., or insurance. The term database may be narrowed to specify particular aspects of organized collection of data and may refer to the logical database, to physical database as data content in computer data storage or to many other database sub definitions. History Database concept The database concept ... data . It has evolved together with database management systems which enable the effective handling of databases. Though the terms database and DBMS define different entities, they are inseparable a database s properties are determined by its supporting DBMS and vice versa. The Oxford English ... been unlikely that a complex information system can be built effectively without a proper database ... supported data collection needs to meet respective usability requirements broadly defined by Database Major database usage requirements the requirements below to qualify as a database. Thus, a database ... meet them or converge to meet them. Evolution of database and DBMS technology See also Database ... more details
wiktionary universalUniversal may refer to TOCright Companies and organizations NBC Universal , a media and entertainment company Universal Studios , an American film studio, and subsidiary of NBC UniversalUniversal Channel , a television channel owned by NBC UniversalUniversal Music Group , a family of record labels Universal Records , a record label owned by UMG, founded in 1995 Universal game company Universal Airlines , an airline based in Guyana, operating 2001 2005 Universal Airlines US , an airline based in Michigan, operating 1966 1972 Universal Avionics , a manufacturer of flight control components Universal Corporation , an American tobacco company Universal Gen ve , a Swiss watch company Universal Gym Equipment Universal Helicopters , a commercial helicopter company Universal Records Philippines , a record label in the Philippines, founded in 1977 Universal Stereo , a radio station Universal Weather and Aviation , an aviation products and services company Universal Entertainment Corporation , Japanese software producer and video game producer. Music Universal Borknagar album Universal Borknagar album Universal Orchestral Manoeuvres in the Dark album Universal Orchestral Manoeuvres in the Dark album Universal Troll album Universal Troll album Universal YFriday album Universal YFriday album The Universal , a song by Blur The Universal Small Faces song The Universal Small Faces song Social science Universal history Universal metaphysics Universal Esperantido , a constructed language Linguistic universal , a statement that applies to all languages Cultural universal , a trait common to all cultures The origin of the term Catholicism Other uses Universal act , a type of official or legal proclamation Universal, Indiana , United States HTC Universal , a Pocket PC phone Universal property , a statement in category theory about isomorphic systems. Computationally universal , a concept related to Turing completeness in computability theory Universal certificate ... more details
distinguish The Universal Small Faces song Infobox Single See Wikipedia WikiProject Songs Name The Universal Cover Blur The Universal front single cover.jpg Artist Blur band Blur Album The Great Escape Blur album The Great Escape Released 13 November 1995 Format Gramophone record 7 vinyl jukebox only , Cassette single cassette , 2 x CD single CD Recorded 1995 Genre Britpop Length 3 59 Label EMI , Food Records Producer Stephen Street Last single Country House br 1995 This single The Universal br 1995 Next single Stereotypes song Stereotypes br 1996 Misc External music video YouTube MKvJxtSpKYk The Universal The Universal is a song by English alternative rock band Blur band Blur and is featured on their fourth studio album, The Great Escape Blur album The Great Escape . It was released 13 November 1995 as the second single music single from that album, charting at 5 in the UK Singles Chart .... It is also Blur s highest rated song at the site. Music video File Blur the universal video.jpg left upright thumb 250px A scene from the highly acclaimed music video for The Universal which inspired ... title Blur The Universal version 1& 93 publisher mvdbase.com date accessdate 2010 06 28 ref The band ... to their roots BBC News Online ref Track listings CD1 The Universal Ultranol No Monsters in Me Entertain Me the live it remix CD2 The Universal II live at the beeb The Universal live Mr Robinson s Quango live It Could Be You live Stereotypes live 7 and Cassette The Universal Entertain Me the live it remix Japan CD The Universal It Could Be You live Stereotypes live Entertain Me the live it remix ... The Universal , Ultranol and No Monsters in Me produced by Stephen Street References refs Blur DEFAULTSORT Universal, The Category Blur band songs Category 1995 singles Category Music videos directed by Jonathan Glazer Category Songs produced by Stephen Street fr The Universal gl The Universal pt The Universal sv The Universal ... more details
Universal data structure Gellish databases are semantic databases that all have the same universally ... that the structure of a Gellish database does not need to be extended when the scope of the database ... order relations are converted into collections of binary relations. A Gellish database consists .... They also contain unique identifiers for the named concept and things. The universal data structure ... International Standards are based on the same ORO principles. A Gellish database requires that each ... by the database structure, which makes them limited and not extensible. Standard fact types relation types in a Gellish Database can be chosen from one of the above ISO standards or from the Gellish English Dictionary Taxonomy. Gellish Databases Each Gellish Database consists of one or more Gellish ... have proprietary data structures, whereas all database tables are different. Each of the Gellish Data ... of Gellish Data Tables into one Database. Furthermore, such a database might be centralized, but can also be a distributed database. This also enables to combine the results of a query to various independent data stores, which then act as a distributed database. The various Gellish Data Tables ... Table subsets. A Gellish Database may be implemented in various formats. It can be in the form of an SQL database, or in RDF XML, or even in XLS the form of Excel spreadsheet tables . Limitations of conventional ... of the database, whereas the relations between the columns define the kinds of facts that can be stored in such a database. Those columns and relations determine the database structure that defines the expression capabilities of the database. Similar rules apply for the structure of data exchange ... database technology has some major constraints When data was not covered during the database design and thus is not included in the data model, then such data cannot be stored in the database nor exchanged ... that data in one database cannot be integrated with data from other databases nor exchanged between ... more details
graph database OpenLink Software OpenLink Virtuoso Universal Server Virtuoso a high performance RDF graph database server, deployable as a local embedded instance as used in the NEPOMUK framework Nepomuk ... ref graph database and universal access layer funded by Deutsche Telekom AG http www.dekorte.com ...A graph database uses Graph data structure graph structures with nodes, edges, and properties to represent and store data. By definition, a graph database is any storage system that provides index free ... graph are distinct from specialized graph databases such as triplestore s and network database model ... w , depending on which aspects of Wikipedia are pertinent to the particular database. Edges are the lines ... over a graph database in a natural way for example graph s diameter computations or community detection . Graph database projects The following is a list of several well known graph database ... Framework RDF and graph database. http www.bigdata.com blog Bigdata a highly scalable RDF graph database capable of 10B edges on a single node or clustered deployment for very high throughput. http www.cloudgraph.com CloudGraph a disk and memory based, fully transactional .NET graph database that uses ... DEX Graph database DEX ref http sparsity technologies.com dex ref A high performance graph database from http sparsity technologies.com Sparsity Technologies , a technology transition company ... GiraffeDB a powerful graph database system for the .NET framework 4.0, capable of representing ... ldg Horton a graph database from http research.microsoft.com en us labs xcg Microsoft Research ... LGPL graph database supporting generalized hypergraph s where edges can point to other edges http ... for small entities ref http infogrid.org wiki Docs License ref graph database with web front end ... cluster instance. OrientDB a high performance open source document graph database http openquery.com graph OQGRAPH Graph computation engine GPLv2 licensed for MySQL , MariaDB and Drizzle database ... more details
by reference to a human curated sequence database. See also Database formats FASTA format Distributed Computing SIMAP UniProt the universal protein database, a central repository of protein data ...see also Protein structure database In the field of bioinformatics , a sequence database is a large collection of computerized digital nucleic acid sequence s, protein sequence s, or other sequences stored on a computer. A database can include sequences from only one organism e.g., a database for all proteins in Saccharomyces cerevisiae , or it can include sequences from all organisms whose DNA has been sequenced. Search issues Sequence databases can be searched using a variety of methods. The most common is probably searching for a sequence similar to a certain target protein or gene whose sequence is already known to the user. The BLAST program is a method of this type. Many inputs create inconsistencies unreferenced section date December 2010 A major problem with all the large genetic sequence databases is that records are deposited in them from a wide range of sources, from individual researchers to large genome sequencing centers. As a result, the sequences themselves, and especially the biological annotations attached to these sequences, vary tremendously in quality. Also there is much redundancy, as multiple labs often submit numerous sequences that are identical, or nearly identical, to others in the databases. Many annotations are based not on laboratory experiments, but on the results of sequence similarity searches for previously annotated sequences. Of course, once a sequence has been annotated based on similarity to others, and itself deposited in the database, it can ... there may be several such annotation transfers by sequence similarity between a particular database ... NCBI completely sequenced genomes http www.yeastgenome.org Stanford Saccharomyces Genome Database http www.ncbi.nlm.nih.gov protein Protein , the National Institute of Health NIH protein database, a collection ... more details
Infobox software name Hibari logo screenshot caption author developer Gemini Mobile Technologies released 2010 status Active latest release version development snapshot latest release date release date 2010 09 11 latest preview version latest preview date frequently updated yes programming language Erlang programming language Erlang operating system Cross platform language English genre Key value pair Key value store license Apache License 2.0 website http hibari.sourceforge.net Portal Free software Notability date September 2010 Hibari is a strongly consistent, highly available, distributed, key value big data store. ref http hibari.sourceforge.net Hibari project homepage ref It was developed by Gemini Mobile Technologies to support its mobile messaging and email services and released as open source on July 27, 2010. ref name pressrelease Release announcement at Gemini Mobile website http www.geminimobile.com news news100714 en .html Open Source Release of Hibari , A Database for Big Data ref Hibari, a Japanese name meaning Cloud Bird , can be used in cloud computing with services&mdash such as social networking &mdash requiring the daily storage of potentially terabyte s or petabyte s of new data. ref name pressrelease Interfaces Hibari supports APIs such as Amazon S3 , JSON RPC and Universal Binary Protocol plans have been announced for support of Apache Thrift , Avro serialization system Avro and Protocol Buffers in addition to Erlang programming language Erlang , the language it was developed in, Hibari supports language binding s such as Java software platform Java , C programming language C , C , Python programming language Python , and Ruby programming language Ruby . ref name pressrelease References Reflist DEFAULTSORT Hibari Database Category Free database management systems Category 2010 software Category Erlang programming language Category Cloud storage Category Distributed data storage Category NoSQL database software stub ... more details
mergefrom Relational database management system discuss Talk Relational database Merger proposal date October 2011 refimprove date September 2009 Image Emp Tables Database .PNG thumb A visual diagram showing the relationship between the two tables, as indicated by the arrow A relational database is a database that conforms to relational model theory. The software used in a relational database is called a Relational database management systems relational database management system RDBMS . Colloquial use of the term relational database may refer to the RDBMS software, or the relational database itself. A relational database is the predominant choice in storing data, over other models like the hierarchical database model or the network model . Contents Terminology The term relational database ... ref Image Relational database terms.svg 350px thumb right Relational database terminology. Relational database theory uses a set of mathematical terms, which are roughly equivalent to SQL database terminology. The table below summarizes some of the most important relational database terms and their SQL database equivalents. class wikitable Relational term SQL equivalent relation database ... Relations or Tables main Relation database Table database A relation database relation is defined ... is usually described as a Table database table , which is organized into Row database rows and Column database columns . All the data referenced by an attribute are in the same Domain mathematics ... from Relational database main Relvar View database In a relational database, all data are stored and accessed via relation database relation s. Relations that store data are called base relations , and in implementations ... . In implementations these are called View database views or queries . Derived relations are convenient ... of implementing business rules in the database. SQL implements constraint functionality in the form of check constraint s. Constraints restrict the data that can be stored in relation database relation ... more details
Database state may refer to Database state, in database technology the set of stored data. Entering, modifying, or deleting information changes the database state. A state that practices Mass surveillance . disambig ... more details
Protein database may refer to Any protein structure database Any protein sequence database Exact names Protein NIH Protein database of the National Institute of Health Protein Database of Bio Synthesis, Inc. disambig ... more details
10.1073 pnas.0701214104 pmc 1890499 ref The database is useful for the study of metabolic metabolism evolution . External links http www.manet.uiuc.edu Molecular Ancestry Network MANET database References ... more details
A database machine or back end processor is a computer or special hardware that stores and retrieves data from a database . It is specially designed for database access and is coupled to the main front end computer s by a high speed channel. This contrasts with a database server , which is a computer in a local area network that holds a database. The database machine is tightly coupled to the main CPU , whereas the database server is loosely coupled via the network. An example is the IBM System 38 . Database FOLDOC Category History of computing Category Databases compu hardware stub ... more details
A Centralized database is a database located and maintained in one location, unlike a distributed database . One main advantage is that all data is located in one place. The disadvantage is that bottlenecks may occur. database stub web stub Category Types of databases ... more details
A negative database , in Credit Card terms, refers to a list of Credit Card owners who chargeback a lot. Negative databases are usually maintained by Credit Card companies. The term negative database also refers to a security concept in database terms where contrary to traditional databases, such database saves attributes that cannot be associated with a certain entry. http sigfpe.blogspot.com 2006 10 negative databases.html http www.economist.com science displayStory.cfm?story id 7854216 Database Category Credit cards Category Database security econ stub database stub ... more details
Infobox software name Oracle Database logo Image Oracle logo.svg 250px screenshot caption developer Oracle ... York, NY 10019 genre Object relational database management system ORDBMS status Active programming language ... http www.oracle.com www.oracle.com The Oracle Database commonly referred to as Oracle RDBMS or simply as Oracle is an object relational database management system ORDBMS ref cite web url http download.oracle.com ... Physical and logical structures An Oracle database system identified by an alphanumeric system identifier ... authorlink coauthors date year 2008 month August work Oracle Database Client quote The SID automatically defaults to the database name portion of the global database name sales in the example sales.us.example.com ... value. ref comprises at least one Database instance of the application, along with data storage ... information such as data buffers, SQL commands, and user information. In addition to storage, the database consists of online redo log s or logs , which hold Database transaction transactional history ... data replication . If the Oracle database administrator has implemented Oracle RAC Real Application ... Expert Oracle Database 11g Administration url http books.google.com ?id tdRes4IdLiIC accessdate ... data blocks. Data blocks form the basic units of data storage. There is also a Partition database partitioning feature available on newer versions of the database, which allows tables to be partitioned ... large data sets. Oracle database management tracks its computer data storage with the help of information ... dictionary and often by default index database indexes and cluster computing clusters . A data dictionary consists of a special collection of table database tables that contains information about all user object computer science objects in the database. Since version 8 i , the Oracle RDBMS also ... of all changes to the database, used to recover from an instance failure. Note that often ... for example to be applied to a standby database, or to perform recovery after an instance ... more details
NMR database NMR nuclear magnetic resonance may refer to NMR spectra database , a collection of NMR spectra for a large number of compounds NMR database method , a strategy to identify the stereochemistry of certain chiral compounds dab ... more details
unreferenced date August 2011 A database server is a computer program that provides database services to other computer programs or computer s, as defined by the client server software modeling model . The term may also refer to a computer dedicated to running such a program. Database management system s frequently provide database server functionality, and some database management system DBMSs e.g., MySQL rely exclusively on the client server model for database access. Such a server is accessed either through a front end running on the user s computer which displays requested data or the back end which runs on the server and handles tasks such as data analysis and storage. In a Master slave technology master slave model, database master servers are central and primary locations of data while database slave servers are synchronized backups of the master acting as proxies. Some examples of proprietary database servers are Oracle Corporation Oracle , IBM DB2 DB2 , Informix , and Microsoft SQL Server . Examples of GNU General Public Licence database servers are Ingres database Ingres and MySQL . Every server uses its own query logic and structure. The SQL query language is more or less the same in all the database servers. See also Replication computer science Database replication Database replication Database Category Data management Category Servers computing Category Databases software type stub database stub de Datenbankserver id Server basis data kk nl Databaseserver ... more details
The Diseases Database is a database that underlies a free website that provides information about the relationships between medical conditions, symptoms , and medications . The database is run by Medical ... Organization The Diseases Database is based around a collection of concepts related to human medicine .... These are referred to as items . There are around 8,000 items within the database. ref http www.diseasesdatabase.com ... resources three sets of metadata are modelled within the database. Firstly, Diseases Database ... heart disease . More formally the database employs an entity attribute value model with items ... infarction . Such relationships aggregate within the database and allow lists to be retrieved ... infarction. Secondly, most Diseases Database items are assigned topic specific hyperlinks to Web ..., most Diseases Database items are mapped to concepts within the Unified Medical Language System UMLS ... notes for the majority of items on the database. The UMLS map also enables links to and from other medical classifications and terminologies e.g. ICD 9 and SNOMED . Diseases Database content can thus ... concept code for Myocardial infarction 22298006 finds the equivalent Diseases Database item ... Diseases Database References Reflist Category Bioinformatics Category Medical literature Category Medical databases ar az Diseases Database be Diseases Database bs Diseases Database ca Diseases Database cy Cronfa ddata o Afiechydon et Diseases Database es Diseases Database fa fr Diseases Database gl Diseases Database ko id Diseases Database he Diseases Database jv Diseases Database nl Diseases Database no Diseases Database pl Diseases Database pt Diseases Database ru Diseases Database sr Diseases Database sh Diseases Database sv Diseases Database ta tr Hastal k Veri Taban uk Diseases Database ur vi Diseases Database zh ... more details
The Openedge Database is a relational database with some growing Object capabilities . It was formerly known as the Progress RDBMS. see also Progress Software Corporation OpenEdge Advanced Business Language sources date February 2012 database software stub Category Proprietary database management systems ... more details
unreferenced date November 2011 Basis database or OpenText Collections Server is a database produced by Open Text Corporation . External links http www.opentext.com 2 global products products library and collection management products opentext collections server.htm Open Text Corporation product website database software stub Category Database management systems ... more details
Refimprove date May 2009 A database refactoring is a simple change to a database schema that improves its design while retaining both its behavioral and informational semantics. A database refactoring is conceptually more difficult than a code refactoring code refactorings only need to maintain behavioral semantics while database refactorings also must maintain informational semantics. ref Scott Ambler and Pramod Sadalage 2006 . Refactoring databases Evolutionary database design . Addison Wesley. ISBN 978 0321293534 ref The process of database refactoring is the act of applying database refactorings to evolve an existing database schema database refactoring is a core practice of evolutionary database design . You refactor a database schema for one of two reasons to develop the schema in an evolutionary manner in parallel with the evolutionary design of the rest of your system or to fix design problems with an existing legacy database schema Database refactoring does not change the way data is interpreted or used and does not fix computer bug bug s or add new functionality. Every single refactoring to a database leaves the system in a working state, thus not causing maintenance lags, provided the meaningful data exists in the production environment. An example of database refactoring would be splitting an aggregate table into two different tables in the process of database normalization Tools LiquiBase See also Database testing Refactoring Test driven development Unit testing References Reflist External links http www.infoq.com presentations ambler database refactoring Database refactoring presentation at InfoQ.com by Scott W. Ambler http www.agiledata.org essays databaseRefactoring.html The Process of Database Refactoring by Scott W. Ambler http www.agiledata.org essays databaseRefactoringCatalog.html Catalog of Database Refactorings . by Scott W. Ambler. http www.databaserefactoring.com Database Refactoring Website by Pramod Sadalage Database Category Extreme programming ... more details
Technical date March 2012 Database normalization is the process of organizing the Field computer science fields and Table database table s of a relational database to minimize redundancy and dependency ... of a field can be made in just one table and then propagated through the rest of the database ... database table database table the computerized representation of a relation database relation is often .... An Introduction to Database Systems . Addison Wesley 1999 , p. 290 ref Most 3NF tables are free of insertion ... form 4NF , and Fifth normal form 5NF but typically not Sixth normal form 6NF . A standard piece of database ... have somehow failed to meet requirements. Date, C.J. Database in Depth Relational Theory for Practitioners ... and manipulated using a universal data sub language grounded in first order logic . ref The adoption of a relational model of data ... permits the development of a universal data sub language based ... flawed. ref Codd, E.F. Chapter 23, Serious Flaws in SQL , in The Relational Model for Database ... of each of these objectives. Free the database of modification anomalies File Update anomaly.svg 280px ... is known as a deletion anomaly . Minimize redesign when extending the database structure When a fully normalized database structure is extended to allow it to accommodate new types of data, the pre existing aspects of the database structure can remain largely or entirely unchanged. As a result, applications interacting with the database are minimally affected. Make the data model more informative ..., though, the database can answer only that one single query. It cannot by itself answer interesting ... come from special adaptive tools completely separate from the database. One tool might be software ... within the database framework, with a normalized table. Example Querying and manipulating ... by user computing users and application software applications and evaluated by the database ... to uniquely identify a database record. A table might have many superkeys. Candidate key A candidate ... more details
lowercase title The tz database , also called the zoneinfo database or IANA Time Zone Database , is a collaborative ... tz link.htm date 2007 11 29 accessdate 2007 12 03 ref It is sometimes referred to as the Olson database ... tz ref Paul Eggert is editor and maintainer of the tz database. ref cite mailing list last Eggert ... database time zones . ref cite mailing list last Eggert first Paul title proposal for time zone names date 1993 10 20 mailinglist tz ref The database attempts to record historical time zones and all ... thumb upright 1.8 The tz database partitions the world into regions where local clocks have all been the same since 1970. This map, taken from the 2009r edition of the database, is of all ... s database, as well as some reference source code , is in the public domain . ref cite mailing list ... nowiki date 1995 11 11 mailinglist tz ref New editions of the database are published as changes warrant ... accessdate 2011 10 07 ref was filed concerning copyright in the database. As a result, on October 6, 2011, the database s maintenance mailing list and dissemination FTP site operations were shut down ... 10 06 ref The case revolves around the use by the database maintainers of the atlases The American Atlas ... and in some auxiliary link collections maintained with the database, but doesn t actually point at the database itself. The complaint relates only to the compilation of historical timezone data ... zone database shut down url http www.thedailyparker.com PermaLink,guid,c5f28bae 4b9c 41ea b7b7 8891ad63c938.aspx ... cite web title Time zone database Astrolabe s opinion url http blog.joda.org 2011 10 time zone database astrolabes opinion.html work Stephen Colebourne s blog date 13 October 2011 accessdate 26 October 2011 ref The tz database clearly references its sources, including the atlas, in comments, allowing ... database down url http blog.joda.org 2011 10 today time zone database was closed.html work Stephen ... Filed, Involving the Time Zone Database url http slashdot.org story 11 10 06 1743226 date 2011 10 ... more details
Unreferenced date March 2007 For information on obtaining the Wikipedia database, see Wikipedia Database download . A database dump contains a record of the Table database table structure and or the data from a database and is usually in the form of a list of SQL statements. A database dump is most often used for backup backing up a database so that its contents can be restored in the event of data loss . Data corruption Corrupted databases can often be recovered by analysis of the dump. Database dumps are often published by free software and free content projects, to allow reuse or Fork software development forking of the database. Example source lang sql Database CREATE DATABASE example USE example Table structure for table users CREATE TABLE users id int 8 unsigned NOT NULL AUTO INCREMENT, username varchar 16 NOT NULL, password varchar 16 NOT NULL, PRIMARY KEY id Data for table users INSERT INTO users VALUES 1, alice , secret , 2, bob , secret source See also Core dump Databases Database management system References Empty section date July 2010 External links http dev.mysql.com doc refman 5.0 en mysqldump.html mysqldump A Database Backup Program http www.postgresql.org docs 8.2 interactive backup dump.html PostgreSQL dump backup methods , for PostgreSQL databases. databases Category Database administration tools database stub de Datenbankdump ... more details
Mergefrom Schema object date March 2012 Image Mediawiki dbschema.svg thumb A depiction of MediaWiki database schema. A database schema pronounced skee ma , IPA en ski.m of a database system is its structure described in a formal language supported by the database management system DBMS and refers to the organization of data to create a blueprint of how a database will be constructed divided into database tables . The formal definition of database schema is a set of formulas sentences called integrity constraints imposed on a database. These integrity constraints ensure compatibility between parts of the schema. All constraints are expressible in the same language. A database can be considered a structure in realization of the database language . ref name source1 The states of a created conceptual schema are transformed into an explicit mapping, the database schema. This describes how real world entities are modeled in the database. br A database schema specifies, based on the database administrator s knowledge of possible applications, the facts that can enter the database, or those of interest to the possible end user s. ref name source3 The notion of a database schema plays the same ... to a database, which can be seen at any instant of time as a mathematical object . Thus a schema can ... specifically for a type of database, all expressed in the same database language. ref name source1 In a relational database , the schema defines the Table database tables , Field computer science fields , Relational model relationship s, View database view s, Index database index es, Software ... queue s, Database trigger trigger s, Data type type s, sequence s, materialized view s, Synonym database synonym s, database link s, Directory file systems directories , Java programming language ... a schema is defined in text database language, the term is often used to refer to a graphical depiction of the database structure. In other words, schema is the structure of the database that defines ... more details
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