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
A geographical database is a database of geographic data , such as countries , administrative divisions , cities , and related information. Such databases can be useful for websites that wish to identify the locations of their visitors for custimization purposes. See also GeoNames Toponymy External links http geonames.org GeoNames http geodatasource.com GeoDataSource Category Geographical databases ... more details
Intellectual property In European Union law , database rights are specifically coded i.e. sui generis laws on the copying and dissemination of information in database computer databases . These rights were first introduced in 1996. A database right is considered to be a property right , comparable to but distinct from copyright , that exists to recognise the investment that is made in compiling a database ... web section 13. 1 quote A property right database right subsists, in accordance with this Part, in a database ... of the database. url http www.opsi.gov.uk si si1997 19973032.htm title The Copyright and Rights ... these database rights. Rights afforded to manual records under EU database rights laws are similar in format, but not identical, to those afforded artistic works. Database rights last for 15 years. Each time a database is substantially modified, however, a new set of rights are created for that database. An owner has the right to object to the copying of substantial parts of their database, even if data is extracted and reconstructed piecemeal. Database rights under the EU are created automatically ... not have to be registered to have effect. Database rights are independent of copyright The arrangement, selection, and presentation of the data may be protected by copyright, while the database as a whole can be protected by database right. ref Directive No. 96 9 EC, Article 7, paragraph 4 ref United .... 8 of the United States Constitution , therefore no database right exists in the United States. Originality ... Service . This has not stopped database owners lobbying for the introduction of such a right, but so ... litigated by Telstra, establishing a database right however this was overturned in a later ruling ... Code of Russia , a database is a collection of independent materials presented in an objective form ... arranged in a way that these materials can be found and processed by a computer. A database ... Union Category Database law de Datenbankwerk el fr Protection juridique ... more details
Refimprove date June 2009 The Beilstein database is the largest Chemical databasedatabase in the field of organic chemistry , in which compounds are uniquely identified by their Beilstein Registry Number . The database covers the scientific literature from 1771 to the present and contains experimentally validated information on millions of chemical reaction s and Chemical substance substances from original scientific publication s. The electronic database was originally created from Beilstein s Handbook of Organic Chemistry , founded by Friedrich Konrad Beilstein in 1881, but has appeared online under a number of different names, including Crossfire Beilstein. Since 2009, the content has been maintained and distributed by Elsevier Information Systems in Frankfurt under the product name Reaxys ref http www.reaxys.com info press room ref . The database contains information on reactions, substances, structures and properties. Up to 350 fields containing chemical and physical data such as melting point , refractive index etc. are available for each substance. References to the literature in which the reaction or substance data appear are also given. The Beilstein content made available through Reaxys ref cite web url http www.reaxys.com title Reaxys accessdate 4 January 2011 ref is complemented by information drawn from Gmelin which gives access to the Gmelin database Gmelin Database , a very large repository of Organometallic chemistry organometallic and inorganic chemistry inorganic information, as well as by information drawn from the Patent Chemistry Database. The Reaxys registered trademark and the database itself are owned and protected by Elsevier Properties SA and used under license. See also Dortmund Data Bank List of academic databases and search engines References Reflist Category Chemical databases Category Organic chemistry Category Bibliographic databases cs Beilsteinova datab ze de Beilsteins Handbuch der Organischen Chemie nl Beilstein database ja ... more details
For the company formerly known as Database Publications , see Europress . Unreferenced date July 2009 Database publishing is an area of automated media production in which specialized techniques are used to generate paginated documents from source data residing in traditional database s. Common examples are catalogues, direct marketing, report generation, price lists and telephone directories. The database content can be in the form of text and pictures but can also contain metadata related to formatting and special rules that may apply to the document generation process. Database publishing can be incorporated into larger workflows as a component, where documents are created, approved, revised and released. The basic idea is using database contents like article and price information to fill out pre formatted template documents. Templates are typically created in a normal desktop layout application where certain boxes or text are designated as placeholders. These placeholders are then targeted with new content which flows in from the database. This allows for quick generation of final output and, in case of changes to the database, quickly perform updates, with limited or no manual intervention. Another model of database publishing is found in many Web to Print solutions where users ... of data is from user input, but it is captured in a database so that if the same user revisits the site later, they can resume editing where they left off. The form is then pre filled from the database ... of Database Publishing are the rendering of content for direct PDF output. This approach prevents manual .... See also Desktop publishing Dynamic publishing Variable data printing Database DEFAULTSORT Database Publishing Category Reporting software Category Direct marketing Category Publishing terms Category Workflow technology Category Databases publish stub de Database Publishing lv Datub zes izdevniec ba nl Database publishing ... more details
Database security concerns the use of a broad range of information security controls to protect databases potentially including the data, the database applications or stored functions, the database systems, the database servers and the associated network links against compromises of their confidentiality ..., procedural administrative and physical. Database security is a specialist topic within the broader realms of computer security , information security and risk management . Security risks to database systems include, for example Unauthorized or unintended activity or misuse by authorized database users, database administrators, or network systems managers, or by unauthorized users or hackers ... changes to the database programs, structures or security configurations Malware infections causing ... of or damage to the data or programs, interruption or denial of authorized access to the database, attacks on other systems and the unanticipated failure of database services Overloads, performance ... Physical damage to database servers caused by computer room fires or floods, overheating, lightning ..., mistakes in database or system administration processes, sabotage criminal damage etc. Many ... control Database audit Auditing Authentication Encryption Data integrity Integrity controls Backups .... While network security controls remain valuable in this regard, securing the database systems ... approaches to database security, working from both the outside in and the inside out as it were. Many ... control measures for their database systems. These may reflect general information security requirements ... accepted good database security practices such as appropriate hardening of the underlying systems and perhaps security recommendations from the relevant database system and software vendors. The security designs for specific database systems typically specify further security administration and management ..., database replication synchronization and backups along with various business driven information ... more details
Upsizing is the term coined by Microsoft to describe the process of upgrading Microsoft Access Database to a Microsoft SQL Server . This allows to continue using Microsoft Access as a database front end whereas the actual Back End database back end is served by a separate local or remote SQL Server allowing much higher productivity and data volumes. Microsoft Access from the version 2000 on has a special Upsizing Wizard which facilitates the data migration to the proprietary Microsoft SQL Server. No other RDBMS are currently supported for upsizing. Upsizing strategies There are two strategies how database can be migrated from Access to a SQL Server. Using ODBC from Microsoft to get access to a remote database via ActiveX Data Objects ADO . Using Access Project s available in Microsoft Access Microsoft Access 2000 and higher which allow more native integration with Microsoft SQL Server . The first strategy is often seen as the first step towards complete migration on a SQL server on the stage 2 ref Thomas Gro ,Claudia Clemens Upsizing von Access zu SQL Server , dotnetpro 6 2004 ref , and can ... wikitable Parameter Strategy 1 Strategy 2 Database access Via ODBC using ActiveX Data Objects ADO , somewhat ... Native support only for Microsoft SQL Server The role of Access Serves as database front end with full features of Microsoft Access Microsoft Jet Database Engine JET Engine and Visual Basic for Applications VBA . compare to thick client Serves as database front end with limited functionality. Local ... of recordset object ref . Queries are generally transformed into View databasedatabase views , VBA ... . Performing the upsizing As any data migration procedure Microsoft Access database upsizing requires fundamental code refactoring refactoring of the database structure and source code. Even though ... of Microsoft Microsoft Jet Database Engine JET SQL to Transact SQL . Substantial adaptation of object ... references DEFAULTSORT Upsizing Database Category Microsoft database software ... more details
Infobox journal title Database The Journal of Biological Databases and Curation cover Image Cover database.gif discipline Life sciences abbreviation Database website http database.oxfordjournals.org editor D Landsman , and R Gentleman , J Kelso and BFF Ouellette discipline Bioinformatics peer reviewed yes language English language English publisher Oxford Journals country England ISSN 1758 0463 openaccess Full Primary sources date June 2010 Database is an online Open access publishing open access scientific journal that publishes peer review ed research for the presentation of novel ideas in database research and biocuration . References Category Biology journals Category Databases sci journal stub ... more details
A probabilistic database is an uncertain database in which the possible worlds have associated probability probabilities . Probabilistic database management systems are currently an active area of research. While there are currently no commercial probabilistic database systems, several research prototypes exist... ref Vinod Muthusamy, Haifeng Liu, Hans Arno Jacobsen http www.eecg.toronto.edu jacobsen ptopss.pdf Predictive Publish Subscribe Matching. University of Toronto. ref Probabilistic databases distinguish between the logical data model and the physical representation of the data much like relational database s do in the ANSI SPARC Architecture . In probabilistic databases this is even more crucial since such databases have to represent very large numbers of possible worlds, often exponential in the size of one world a classical database , succinct data structure succinctly ref Nilesh N. Dalvi , Dan Suciu Efficient query evaluation on probabilistic databases. VLDB J. 16 4 523 544 2007 ref ref Lyublena Antova , Christoph Koch , Dan Olteanu 10 10 6 Worlds and Beyond Efficient Representation and Processing of Incomplete Information. ICDE 2007 606 615 ref . database stub References references External links The http www.cs.cornell.edu database OLD maybms MayBMS project at Cornell University http maybms.sourceforge.net sourceforge.net project site The http www.cs.washington.edu homes suciu project mystiq.html MystiQ project at the University of Washington The http orion.cs.purdue.edu Orion project at Purdue University The http infolab.stanford.edu trio Trio project at Stanford University The http www.eecs.berkeley.edu Research Projects Data 102060.html BayesStore project at the University of California, Berkeley The http www.cs.umd.edu amol PrDB PrDB project at the University of Maryland, College Park databases Category Database management systems Category Types of databases Category Database theory es Base de datos probabil stica ... more details
Refimprove auto yes date December 2009 In relational database s and flat file database s, a table is a set of data elements values that is organized using a model of vertical column database columns which are identified by their name and horizontal row database rows . A table has a specified number of columns, but can have any number of rows Citation needed date December 2010 . Each row is identified by the values appearing in a particular column subset which has been identified as a unique key index. Table is another term for relation database relation s although there is the difference in that a table is usually a multi set bag of rows whereas a relation is a set and does not allow duplicates. Besides the actual data rows, tables generally have associated with them some Metadata meta information , such as Check Constraint constraints on the table or on the values within particular columns. The data in a table does not have to be physically stored in the database. view database Views are also ..., which represent a pointer to a table in another database. Comparisons with other data structures ... of databases, a table can be considered a convenient representation of a relation database relation .... However, the database system does not guarantee any ordering of the rows unless an order by SQL ... exist. A relational table , which is the basic structure to hold user data in a relational database ... these tables. ref cite book title Oracle Database SQL Reference 10g Release 1 10.1 author Diana ... i2095331 id Part Number B10759 01 ref See also Relation database Row database Column database Table information References Reflist Databases Interwikies DEFAULTSORT Table Database Categories Category SQL Category Data modeling Category Relational database management systems Database stub ar ... fr Table base de donn es ko lv Tabula nl Tabel database ja no Tabell database pl Tabela bazy danych pt Tabela banco de dados sr uk ... more details
Wikify date July 2009 Database preservation usually involves converting the information stored in a database, without losing the characteristics Context, Content, Structure, Appearance and Behaviour of the data, to a format which can be used in the long term, even if the technology and daily life knowledge changes. Database preservation projects In the past different research groups have been contributing to the solutions of the problems of database preservation. Research projects carried out in the past in this regard include Software independent archival of relational databases SIARD ref http arxiv.org abs cs 0408054v1 ref Repository of Authentic Digital Objects RODA ref http repositorium.sdum.uminho.pt bitstream 1822 8226 1 RodaAndCrib.pdf ref Digital Preservation Testbed ref http www.digitaleduurzaamheid.nl bibliotheek docs volatility permanence databases en.pdf ref Lots of Copies Keep Stuff Safe LOCKSS ref http www.lockss.org ref See also Digital Preservation References Reflist Database Category Digital libraries Category Preservation library and archival science Category Data quality Category Conservation and restoration ... more details
Database design is the process of producing a detailed data model of a database . This logical data model ... to generate a design in a Data Definition Language , which can then be used to create a database. A fully attributed data model contains detailed attributes for each entity. The term database design can be used to describe many different parts of the design of an overall database system . Principally ... to store the data. In the relational model these are the database table tables and database view views . In an object database the entities and relationships map directly to object classes and named relationships. However, the term database design could also be used to apply to the overall process ... database application within the database management system DBMS . ref Gehani, N. 2006 . The Database ... of doing database design generally consists of a number of steps which will be carried out by the database ... name Teorey, T.J. 2009 Teorey, T.J., Lightstone, S.S., et al., 2009 . Database Design Know it all.1st ... MMORPG.png thumb 320px A sample Entity relationship diagram Database designs also include ER .... This step is not necessary with an Object database . ref name Teorey, T.J. 2009 The Design Process howto section date October 2011 The design process consists of the following steps ref Database design basics. n.d. . Database design basics. Retrieved May 1, 2010, from http office.microsoft.com en us access HA012242471033.aspx ref Determine the purpose of your database This helps prepare ... you might want to record in the database, such as product name and order number. Divide ... the Database normalization normalization rules Apply the data normalization rules to see if your tables ... of cases, a person who is doing the design of a database is a person with expertise in the area of database design, rather than expertise in the domain from which the data to be stored is drawn e.g. financial information, biological information etc. Therefore the data to be stored in the database ... more details
Refimprove date December 2008 Database tuning describes a group of activities used to optimize and homogenize the performance of a database . It usually overlaps with query language query tuning, but refers to design of the database files, selection of the database management system DBMS , operating system and CPU the DBMS runs on. The goal is to maximize use of system resources to perform work as efficiently and rapidly as possible. Most systems are designed to manage work efficiently, but it is possible to greatly improve performance by customizing settings and the configuration for the database and the DBMS being tuned. I O tuning Hardware and Computer software software configuration of disk subsystems are examined Redundant array of independent disks RAID levels and configuration ref cite web url http members.value.com.au christie auug93.htm H1.1 title Performance Tuning for Relational Database Applications accessdate 2008 09 26 ref , Block storage block and stripe size allocation, and the configuration ... of I O, and affect performance for all users of the database. Placing them appropriately is crucial ... processing resources , and Communications protocol network protocols used to communicate with database ... database cache cache of data makes activities perform faster. The same consideration is given to work ... resources for the database. Database maintenance Database maintenance includes backup s, column statistics updates, and defragmentation of data inside the database files. ref cite web url http www.sqlmag.com Article ArticleID 41844 sql server 41844.html title Inside Database Maintenance Plans , SQL Server Magazine accessdate 2008 09 26 ref On a heavily used database, the transaction log .... Frequent transaction log backups are smaller, so they interrupt database activity for shorter periods ..., and the amount of free space in database pages to accept Insert SQL inserts of data without creating additional pages. References Reflist Database Category Database management systems Category Mathematical ... more details
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