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
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
morereferences date October 2008 A database system is a term that is typically used to encapsulate the constructs of a data model , database Management system DBMS and database . ref Beynon Davies P. 2004 . Database Systems 3rd Edition. Palgrave, Basingstoke, UK. ISBN 1 4039 1601 2 ref A database is an organised pool of logically related data. Data is stored within the data structures of the database. A DBMS is a suite of computer software providing the interface between users and a database or databases. A DBMS is a shell which surrounds a database or series of databases and through which all interactions take place with the database. The interactions catered for by most existing DBMS fall into four main groups Data Definition. Defining new data structures for a database, removing data structures from the database, modifying the structure of existing data. Data Maintenance. Inserting new data into existing data structures, updating data in existing data structures, deleting data from existing data structures. Data Retrieval. Querying existing data by end users and extracting data for use by application programs. Data Control. Creating and monitoring users of the database, restricting access to data in the database and monitoring the performance of databases. Both a database and its DBMS conform to the principles of a particular data model. ref Tsitchizris, D. C. and F. H. Lochovsky 1982 . Data Models. Englewood Cliffs, Prentice Hall. ref Data models include the Hierarchical model hierarchical data model , the Network model network data model , the Relational model relational data model and the Object database object oriented data model . See also Heterogeneous Database System References reflist Database models DEFAULTSORT Database System Category Database management systems ko ru ... more details
An online database is a database accessible from a network, including from the Internet . It differs from a local database, held in an individual computer or its attached storage, such as a CD. For the system or software designed to manage a database, see Database management system s DBMS For information on the structure of a database itself, see Database For information on the programs for searching a database, see Search engine s Currently, there are several database products designed specifically as hosted databases delivered as Software as a Service products. These differ from typical traditional databases such as Oracle, Microsoft SQL Server, Sybase, etc. Some of the differences are These online databases are delivered primarily via a web browser They are often purchased by a monthly subscription They embed common collaboration features such as sharing, email notifications, etc. For information on the contents of specific types of database, see Bibliographic database s Customer relationship management To learn about generic online databases that can be used by any software application, see Cloud database . See also List of online databases List of search engines List of academic databases and search engines References Unreferenced date October 2009 DEFAULTSORT Online Database Category Online databases Category Types of databases compu network stub ... more details
A lexical database is a lexical resource which has an associated software environment database which permits access to its contents. The database may be custom designed for the lexical information or a general purpose database into which lexical information has been entered. Information typically stored in a lexical databasedatabase includes lexical category and synonyms of words, as well as semantic relations between different words or sets of words. See also Machine readable dictionary WordNet External links http wordnet.princeton.edu The WordNet Home Page database stub Category Lexical databases Category Translation databases ar ... more details
unreferenced date August 2007 A database engine or storage engine is the underlying software component that a database management system DBMS uses to create, read, update and delete CRUD data from a database . Most database management systems include their own application programming interface API that allows the user to interact with their underlying engine without going through the user interface of the DBMS. Many of the modern DBMS support multiple database engines within the same database. For example, MySQL supports InnoDB as well as MyISAM . Some database engines are Database transaction transactional . class wikitable Name Free Transactional Aria storage engine Aria GPL No BlitzDB GPL No Falcon storage engine Falcon GPL Yes InnoDB GPL Yes MyISAM GPL No InfiniDB CPL No XtraDB GPL Yes See also Aria storage engine Architecture of Btrieve Micro Kernel Database Engine Btrieve s Micro Kernel Database Engine Berkeley DB c tree c treeACE Database Engine FLAIM Database Engine InfiniDB InnoDB Microsoft Jet Database Engine MyISAM MySQL Cluster , on the NDB storage engine of MySQL External links http dev.mysql.com tech resources articles storage engine part 3.html http books.google.com books?id PqZ6QytCemcC&pg PT287&dq storage engines MySQL Administrator s Bible Chapter 11 Storage Engines DEFAULTSORT Database Engine Category Data management Category Database management systems database stub az Baza veril nl rin proqramla d rma dill ri es Mecanismos de almacenamiento MySQL fr Moteur de base de donn es lv Datub zes dzin js ja pt Mecanismo de armazenamento ru Database engine ... more details
Too many categories date October 2011 In database processing , sometimes referred to as in database analytics, refers to the integration of data analytics into data warehousing functionality. In database processing eliminates the overhead of moving large data sets from the enterprise data warehouse to a separate analytic software application, providing significant performance benefits. ref name DBTA http www.dbta.com Articles Editorial Trends and Applications Adding Competitive Muscle with In Database Analytics 67126.aspx Adding Competitive Muscle with In Database Analytics, Database Trends & Applications, May 10, 2010 ref In database processing accelerates data analysis, making it relevant for applications requiring high throughput, real time advanced analytics, including fraud detection, transaction processing, pricing and margin analysis, usage based micro segmenting, behavioral ad targeting and recommendation engines. In database processing is performed and promoted as a feature by many of the major data warehousing vendors, including Teradata , Netezza , Greenplum and Aster Data Systems . ref name IE http intelligent enterprise.informationweek.com info centers data int showArticle.jhtml jsessionid YH5ZICM4SKOMRQE1GHPSKH4ATMY32JVN?articleID 212500351&cid RSSfeed IE News In Database Analytics A Passing Lane for Complex Analysis, Intelligent Enterprise, December 15, 2008 ref In database processing is one of several technologies focused on improving data warehousing performance, including parallel computing , shared nothing architecture s and massive parallel processing . database ... isnt in database processing old news.html Isn t In database processing old news yet?, Blog by Tim Manns Data Mining Blog , January 8, 2009 ref References Reflist Database models Databases Software engineering Category Database management systems Category Applied data mining Category Data modeling Category Database theory Category Project management Category System administration Category Transaction ... more details
A spatiotemporal database is a database that manages both space and time information. Common examples include Tracking of moving objects, which typically can occupy only a single position at a given time. A database of wireless communication networks, which may exist only for a short timespan within a geographic region. An index of species in a given geographic region, where over time additional species may be introduced or existing species migrate or die out. Historical tracking of plate tectonic activity. Spatiotemporal databases are an extension of spatial database spatial databases . A spatiotemporal database embodies spatial, temporal database temporal , and spatiotemporal database concepts, and captures spatial and temporal aspects of data and deals with geometry changing over time ref http wis.cs.ucla.edu cchen thesis.ps Data Models and Query Languages of Spatio Temporal Information Bot generated title ref and or location of objects moving over invariant geometry. ref RTLS ref Organizations http vldb.org Very Large Databases http www.dexa.org Database and Expert Systems Applications See also Data warehouse Data mining , Database mining , Data farming Locating engine References Reflist Category Database management systems Category Geolocation Category Wireless locating Category Spatial databases Category Temporal databases database stub ... more details
An Active Database is a database that includes an event driven architecture often in the form of Event Condition Action ECA rules which can respond to conditions both inside and outside the database. Possible uses include security monitoring, alerting, statistics gathering and authorization. Most modern relational databases include active database features in the form of Database trigger SQL Triggers . See also Event driven architecture References cite journal last Paton first Norman W coauthors D az, Oscar title Active database systems journal ACM Computing Surveys year 1999 volume 31 issue 1 pages 63 103 doi 10.1145 311531.311623 url http portal.acm.org citation.cfm?id 311623 accessdate 8 July 2010 publisher ACM location NY, USA issn 0360 0300 Use dmy dates date October 2010 DEFAULTSORT Active Database Category Types of databases Database stub ... more details
A database application is a computer program whose primary purpose is entering and retrieving information from a computer managed database . Early examples of database applications were accounting systems .... A characteristic of modern database applications is that they facilitate simultaneous updates and queries ... to give each user a personal computer and have a program running on that PC that connected to a database Server computing server . Information would be pulled from the database, transmitted over a network ... in the mid 1990s it became more common to build database applications with a Web interface. Rather than ... application. A database application with a Web interface had the advantage that it could be used ... of early database applications with Web interfaces include amazon.com , which used the Oracle database Oracle relational database management system , the photo.net online community, whose implementation on top of Oracle database Oracle was described in the book Database Backed Web Sites Ziff ... oracle news news ebay massive oracle.htm eBay s Massive Oracle Database ref Electronic medical ... ref , in December 2010, as a software database application . A 2005 O Reilly book uses the term in its title Database Applications and the Web. Some of the most complex database applications remain accounting ... by Donald Burleson, Chapter 1 ref Many of today s most widely used computer systems are database ... 21 December 2007 ac cessdate 2008 10 30 ref The etymology of the phrase database application comes ..., compilers, the file system, and tools such as the database management system, and application programs ... program , database application is short for database application program . Not every program that uses a database would typically be considered a database application . For example, many ... massive data sets that programs subsequently analyze. The data sets constitute a database , though they are not typically managed with a standard relational database management system. The computer programs ... more details
Refimprove date December 2009 Orphan date December 2009 A cooperative database is a type of database that holds information on customers and their transactions. Many companies will contribute information to a database in return for aggregate information on the customers other companies have provided. Such databases are used for promotional mailings, credit card fraud detection and fighting E mail spam . Alternatively, the term cooperative database can be used to describe database systems that incorporate techniques to aid users beyond returning direct answers. ref Wesley W. Chu Cooperative Database Systems. Wiley Encyclopedia of Computer Science and Engineering, 2008. ref Such databases can, for example, give explanations as to why a query returns no or few results, detect and report some user misconception suggested by the query, provide justifications for returned answers, or relax query attributes to find close but non precise answers. The fundamental goal is to extend databases towards reflecting the cooperative principle , and in particular, to avoid misleading users by omission of pertinent, contextual detail. References Reflist DEFAULTSORT Cooperative Database Category Anti spam Category Types of databases ... more details
Merge data integrity date March 2011 Unreferenced date December 2009 Expert subject Databases date November 2008 Database integrity ensures that data entered into the database is accurate, valid, and Consistency database systems consistent . Any applicable integrity constraints and data validation rules must be satisfied before permitting a change to the database. Three basic types of database integrity constraints are Entity integrity , not allowing multiple rows to have the same identity within a table. Data domain Domain integrity, restricting data to predefined data type s, e.g. dates. Referential integrity , requiring the existence of a related row in another table, e.g. a customer for a given customer ID. See also Data integrity Bit rot Database DEFAULTSORT Database Integrity Category Data modeling Category Data quality cs Datab zov integrita fr Int grit base de donn es kk lv Datub zes integrit te ru ... more details
The database catalog of a database instance consists of metadata in which definitions of database Object file object s such as base tables, views virtual tables , synonym s, value ranges, index database indexes , User computing users , and user groups are stored. ref citebook title Systems Development Handbook author Paul C. Tinnirello year 1999 publisher CRC Press isbn 0849398223 ref ref cite title CREATE VIEW Transact SQL in SQL Server 2008 Books Online publisher Microsoft Corporation url http msdn.microsoft.com en us library ms187956.aspx ref The SQL standard specifies a uniform means to access the catalog, called the INFORMATION SCHEMA, but not all databases follow this, even if they implement other aspects of the SQL standard. For an example of database specific metadata access methods, see Oracle metadata . References refs Category Database theory database stub ko ... more details
A database administrator short form DBA is a person responsible for the Installation computer programs ... name SFIA cite web url http scripts.bcs.org sfiaplus sfia skills.htm dbad title Database Administration ... development development and design of database Strategy strategies , monitoring and improving database Computer performance performance and Capacity management capacity , and planning for future ... Science implement Computer security security measures to safeguard the database. ref name ACS cite web url http www.acs.org.au ictcareers index.cfm?action show&conID 200707200948211895 title Database ... 03 20 url http www.developer.com db article.php 718491 What Is a Database Administrator.htm title What is a Database Administrator? DBA publisher Developer.com accessdate 2012 02 06 ref Knowledge of SQL Structured Query Language SQL Some database design General understanding of Distributed computing ... itself e.g. Microsoft SQL Server , Oracle Database Oracle , etc. General Skills ref cite web ... a469 768d14d1fc81 40sessionmgr10&vid 4 title Database Administrator? DBA publisher Prakken Publications ... the organization Good team player Certification Employing organizations may require that a database ... are Oracle Database 11g Administrator Certified Professional ref http education.oracle.com pls web ... Corporation . Retrieved 18 June, 2011. ref and MCITP Database Administrator 2008 . ref name microsoft ... Certification . Microsoft Microsoft Corporation . Retrieved 2012 02 06. ref Duties A database administrator .... ref Installation computer programs Installing and upgrade upgrading the database server and application tools Allocating system storage and planning future storage requirements for the database system Creating primary database storage structures tablespace tablespaces after application Software developer developers have designed an application Creating primary objects Table database tables , View database views , Database index indexes once application developers have designed an Application ... more details
notability Products date September 2010 Daffodil DB is a SQL 99 & JDBC 3.0 compliant 100 Java platform Java relational database management system . It has enterprise level features such as full text search , PSM, database trigger trigger s, etc. It is available in both Embedded & Network editions. Daffodil DB also has an open source version named One DB . External links http www.daffodildb.com Java Database Daffodil DB database software stub Category Java platform software Category Java enterprise platform Category Relational database management systems ... more details
A current database is a conventional database that stores data that is valid now . For example, if a user inserts John Smith into the Staff table of a current database, this asserts that the fact is valid now and until it is subsequently deleted. By contrast, a temporal database qualifies each row with a valid time stamp , valid time period or valid time interval . For example, we can assert the fact that John Smith was a member of staff during the period 1 June 2001 and now . Current databases are the most common type of database in use today. The concept of now is discussed in Clifford et alia 1997 . External links cite doi 10.1145 249978.249980 Category Types of databases ... more details
group is a Name Service Switch name service database used to store group information on Unix like operating systems. The sources for the group database and hence the sources for groups on a system are configured, like other name service databases, in nsswitch.conf . Seeing the available groups on a Unix system The contents of the group database and available groups can be seen with a variety of tools Command line The getent command can be used to fetch group information. Fetching a list of all available groups pre getent group pre Fetching a specific group For a specific group called users pre getent group users pre Python http docs.python.org lib module grp.html grp The Group Database &mdash a Python programming language Python module DEFAULTSORT Group Database Category Unix authentication related software unix stub ... more details
2011 Database s are the collection of files which are interconnected. Databases at different ... and integration errors may occur in large database systems which is not feasible from the point of view of system s performance, reliability, consistency and security.So in order to obtain database which satisfy ACID properties of database management system , we need to test it, so the term database testing comes in a picture. ref name Database cite book last Korth first Henry title Database System Concepts year 2010 publisher Macgraw Hill isbn 0 07 352332 1, 9780073523323 ref Purposes of database testing Basically, database testing is a layered process. It consists of four layers namely User interface layer, Business layer, data access layer and database. Testing at these different layers is important for consistent database. Many of system and web soft wares access databases from different ... with interface design of database, Business layer includes databases supporting business strategies ... process. Database testing mainly takes place at this layer which includes our further testing ... first Scott title Agile database Techniques effective strategies for the agile software developer ... to with atomic, consistent, isolated and durable database. The points why we need database testing ... the database operations such as insert,delete,update are preformed without testing database for its consistency,then whole database may crash. Some companies have different types database, have ... test some databases which is not so effective. So in this case database developers will face .... So the separate database testing team is needed. Database testing is mainly deals with the finding ... or web based software. Something different should be done in order to tolerate with database crash, broken insertion, deletion or update. So Database refactoring is evolutionary technique to deals ... in database testing The figure indicates the areas of testings that need to be tested during database ... more details
expert date January 2011 nofootnotes date January 2011 Database auditing involves observing a database so as to be aware of the actions of database user computing user s. Database administrators and consultants ... to access information do not access it. ref cite book last Mullins first Craig title Database ... conducting a database audit includes authentication and authorization issues. The following general principles for developing an audit strategy, auditing suspicious database activity, and auditing normal database activity can guide the auditor throughout the audit. General Principles for Developing ... to get the targeted information. General Principles for Auditing Suspicious Database Activity Audit ... the origins of suspicious database activity. Protect the Audit Trail Protect the audit trail so ... January 19, 2011 ref General Principles for Auditing Normal Database Activity Auditing normal database activity refers to the process of gathering historical information about particular database ... with useless audit information, audit only the targeted database activities. Archive audit records and purge ... 2011 Automated auditing In order to ensure that unauthorized users have not accessed the database ... of monitoring, recording, analyzing, and reporting database activity on a periodic basis. This is a critical concept because unauthorized access to the database and the information contained within ... that is not identified as routine and valid access to the database must be examined and analyzed further. Before beginning the audit, the auditor should access the database environment. This includes ... . The Internal Audit Association lists the following as key components of a database audit Create an inventory of all database systems and use classifications. This should include production and test data. Keep it up to date. Classify data risk within the database systems. Monitoring should be prioritized for high, medium, and low risk data. Implement an access request process that required database ... more details
The Gmelin database is a large Chemical databasedatabase of Organometallic chemistry organometallic and Inorganic chemistry inorganic compounds updated quarterly. It is based on the German publication the Gmelins Handbuch der anorganischen Chemie Gmelin s handbook on inorganic chemistry written by Leopold Gmelin in 1887, and currently contains 1.5 million compounds and 1.3 million different reactions. The latest version contains every compound reaction discovered between 1772 and 1995, with over 85,000 titles, keywords and abstracts, and is maintained by Elsevier MDL . The database has over 800 different data fields on subjects such as the compounds electric, magnetic, thermal, crystal and physiological information. It is the sister database to the Beilstein database , which deals with organic chemicals and reactions. Access is part of the Reaxys system. External links http www.ul.ie library irel beilsteingmelin.htm University of Limerick http www.mimas.ac.uk crossfire ov gmelin.html MIMAS national data center Category Chemical databases Category Inorganic chemistry Category Organometallic chemistry de Gmelins Handbuch der anorganischen Chemie sr Gmelin baza podataka zh ... more details
A Vulnerability Database is a platform aimed at collecting, maintaining, and disseminating information about discovered vulnerabilities targeting real computer systems. Currently, there are many vulnerabilities databases that have been widely used to collect data from different sources on software vulnerabilities e.g., bugs . These data essentially include the description of the discovered vulnerability, its exploitability, its potential impact, and the workaround to be applied over the vulnerable system. Examples of web based vulnerabilities databases are the National Vulnerability Database and the Open Source Vulnerability Database . Please help us to expand the following list of existing vulnerabilities databases. List of Vulnerability Databases http nvd.nist.gov National Vulnerability Database web site http osvdb.org The Open Source Vulnerability Database web site http www.kb.cert.org vuls CERT Coordination Center of Vulnerability Database web site http www.securityfocus.com vulnerabilities Security Focus web site http secunia.com Secunia Category Computer security exploits Category Types of databases computer security stub ... more details
A cloud database is a database that typically runs on a cloud computing platform, such as Amazon EC2 ... on the cloud independently, using a virtual machine image, or they can purchase access to a database service, maintained by a cloud database provider. Of the databases available on the cloud, some ... a database on the cloud Virtual machine Image cloud platforms allow users to purchase virtual machine instances for a limited time. It is possible to run a database on these virtual machines. Users can either upload their own machine image with a database installed on it, or use ready made machine images that already include an optimized installation of a database. For example, Oracle provides a ready made machine image with an installation of Oracle Database 11g Enterprise Edition on Amazon EC2. ref name oracle aws http aws.amazon.com amis Oracle 3647 Amazon Machine Images Oracle Database 11g ... 2011 11 9. ref Database as a service some cloud platforms offer options for using a database as a service, without physically launching a virtual machine instance for the database. In this configuration, application owners do not have to install and maintain the database on their own. Instead, the database service provider takes responsibility for installing and maintaining the database, and application ... cloud 2011 01 7 cloud based database service.php 7 Cloud Based Database Services , http www.readwriteweb.com ... database services as part of its cloud offering, SimpleDB which is a NoSQL key value store, and Amazon Relational Database Service which is an SQL based database service with a MySQL interface. A third option is managed database hosting on the cloud, where the database is not offered as a service, but the cloud provider hosts the database and manages it on the application owner s behalf. For example ... managed hosting services database mysql MySQL Server Support at Rackspace , www.rackspace.com Rackspace.com , Retrieved 2011 11 10. ref Architecture and common characteristics Most database services ... more details
Database theory encapsulates a broad range of topics related to the study and research of the theoretical realm of database s and database management system s. Theoretical aspects of data management include, among other areas, the foundations of query languages, computational complexity and expressive power of queries, finite model theory , database design theory, dependency theory database theory dependency theory , foundations of concurrency control and database recovery , deductive database s, temporal database temporal and spatial database s, real time database s, managing uncertain data and probabilistic database s, and Web data. Most research work has traditionally been based on the relational model , since this model is usually considered the simplest and most foundational model of interest. Corresponding results for other data models, such as object oriented or semi structured model s, or, more recently, graph data models and XML , are often derivable from those for the relational model. A central focus of database theory is on understanding the complexity and power of query languages and their connection to logic . Starting from relational algebra and first order logic which are equivalent by Codd s theorem and the insight that important queries such as graph reachability are not expressible in this language, more powerful language based on logic programming and fixpoint logic such as datalog were studied. Another focus was on the foundations of query optimization and data integration . Here most work studied conjunctive query conjunctive queries , which admit query ... in the area are the ACM Symposium on Principles of Database Systems PODS and the International Conference on Database Theory ICDT . References Citation last Abiteboul first Serge author link ... query Expressive power Database DEFAULTSORT Database Theory Category Database management systems Category Database theory lv Datu b u teorija tr Veritaban kuram zh ... more details
A DNA database or DNA databank is a database of DNA data. A DNA database can be used in the analysis of genetic disease s, genetic fingerprinting for criminology , or genetic genealogy . DNA databases may be national DNA database public or private. These databases do not normally hold DNA except for a short time. DNA fingerprints or DNA profiling DNA profiles are made from the DNA and these are held electronically in the DNA database The largest DNA database in the world is CODIS , ref http www.fbi.gov hq lab codis national.htm CODIS National DNA Index System ref followed by the United Kingdom National DNA Database , ref http www.publications.parliament.uk cgi bin newhtml hl?DB semukparl&STEMMER en&WORDS ndnad&ALL &ANY &PHRASE &CATEGORIES &SIMPLE ndnad&SPEAKER &COLOUR red&STYLE s&ANCHOR 70620w0037.htm spnew5&URL pa cm200607 cmhansrd cm070620 text 70620w0037.htm 70620w0037.htm spnew5 House of Commons Hansard Written Answers for 20 Jun 2007 pt 0037 ref and thirdly a California n DNA database Clarify date September 2009 its records are included in CODIS . The Australia n criminal DNA database is called the National Criminal Investigation DNA Database NCIDD ref http www.crimtrac.gov.au systems projects NationalCriminalInvestigationDNADatabaseNCIDD.html CrimTrac s National Criminal Investigation DNA Database NCIDD ref and the Canada Canadian equivalent is the National DNA Data Bank NDDB ref http www.nddb bndg.org Canadian National DNA Data Bank ref Types A national DNA database is a government database of DNA profiles against which law enforcement agencies can match suspect DNA. A genetic genealogy database is a DNA database of genealogical DNA test results. A medical DNA database is a DNA database of medically relevant genetic variations http www.sciencemag.org content 287 5456 1184.2.full . Privacy Issues Section OR date September 2009 Critics of DNA databases warn that the various ... Dna Database Category Biological databases Category Privacy Category Forensic software fr Base ... more details
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