ObjectQueryLanguage OQL is a querylanguage standard for object database object oriented databases modeled after SQL . OQL was developed by the Object Data Management Group ODMG . Because of its overall complexity no vendor has ever fully implemented the complete OQL. OQL has influenced the design of some of the newer query languages like JDOQL and EJB QL , but they can t be considered as different flavors of OQL. General Rules of OQL The following rules apply to OQL statements All complete statements must be terminated by a semi colon. A list of entries in OQL is usually separated by commas but not terminated by a comma , . Strings of text are enclosed by matching quotation marks. Examples Simple query The following example illustrates how one might retrieve the CPU speed of all PCs with more than 64MB of Random access memory RAM from a fictional Personal computer PC database code SELECT pc.cpuspeed br FROM PCs pc br WHERE pc.ram 64 br code Query with grouping and aggregation The following example illustrates how one might retrieve the average amount of RAM on a Personal computer PC , grouped by manufacturer code SELECT manufacturer, AVG SELECT part.pc.ram FROM partition part br FROM PCs pc br GROUP BY manufacturer pc.manufacturer code Note the use of the keyword code partition code , as opposed to aggregation in traditional SQL . References reflist See also ODMG Object Data Management Group Object Definition LanguageQuery languages Soft eng stub Compu lang stub Category Computer languages Category Query languages de ObjectQueryLanguage es ObjectQueryLanguage eu ObjectQueryLanguage fr ObjectQueryLanguage it ObjectQueryLanguage ja pl ObjectQueryLanguage ... more details
eXpressions MDX is a querylanguage for OLAP databases ObjectQueryLanguage OQL is ObjectQueryLanguageObject Constraint Language OCL Object Constraint Language . Despite its name, OCL is also an objectquerylanguage and an Object Management Group OMG standard OPath , intended for use in querying WinFS Stores Poliqarp QueryLanguage is a special querylanguage designed to analyze ...prose date October 2010 refimprove date October 2010 Query languages are computer language s used to make ... to whether they are database query languages or information retrieval querylanguage s. The difference is that a database querylanguage attempts to give factual answers to factual questions, while an information retrieval querylanguage attempts to find documents containing information that is relevant to an area of inquiry. Examples include .QL is a proprietary object oriented querylanguage for querying relational database s successor of Datalog Contextual QueryLanguage CQL a formal ... catalogues. CQLF CODASYL QueryLanguage, Flat is a querylanguage for CODASYL type databases Concept Oriented QueryLanguage COQL is used in the concept oriented model COM . It is based on a novel ... dimensional analysis, analytical operations and inference D data language specification D is a query ... Data Mining Extensions DMX is a querylanguage for Data Mining models Datalog is a querylanguage ... language that translates HTTP queries to SQL ISBL is a querylanguage for PRTV , one of the earliest ... directory services running over TCP IP Molecular QueryLanguage MQL is a cheminformatics query ... access language, similar in most ways to SQL RDQL is a Resource Description Framework RDF querylanguage SeRQL Sesame RDF QueryLanguage , pronounced circle is a new RDF RDFS querylanguage that is currently ... standard for a substructure search SPARQL is a querylanguage for Resource Description Framework RDF Graph mathematics graphs SQL is a well known querylanguage and Data Manipulation ... more details
Refimprove date July 2009 An objectlanguage is a language which is the object of study in various fields including logic , linguistics , mathematics and theoretical computer science . The language being used to talk about an objectlanguage is called a metalanguage . An objectlanguage may be a formal language formal or natural language natural language. Types of objectlanguage Formal languages Mathematical ... of other languages. In mathematical logic, the objectlanguage is usually a formal language . The language which a metalanguage is used to describe is the objectlanguage. It is called that because that language is the object under discussion using the metalanguage. For instance, someone who ... the objectlanguage French language French . Computer languages There are two ways the term objectlanguage can be used in computing a language which is the object of formal specification, and a language ... language Computer languages are object languages of the metalanguage in which their specification ... , and have that language translated into object code which the computer can immediately use. The compiling ... language in this context means something akin to the object of what the programmer is trying to achieve . If the source language and object languages are viewed as formal logical languages, what the compiler ... use of interpreted language meaning one which is not compiled . Objectlanguage should also not be confused with object oriented language , which is a type of computer programming language which ... to a drag and drop fashion. Objectlanguage in this context is synonymous with target language . The object ..., such as assembly language . Because the objectlanguage of compilation has usually been machine language, the term object file has come to mean a file containing machine instructions, and sometimes the translated program itself is simply called an object . Expressions in an objectlanguage ... mathematical logic sentence s in a formal language . References reflist DEFAULTSORT ObjectLanguage ... more details
noref date June 2010 Infobox programming language name Java Persistence QueryLanguage logo paradigm year designer developer latest release version latest release date latest test version latest test date turing complete No typing implementations dialects influenced by SQL influenced operating system Cross platform license website The Java Persistence QueryLanguage JPQL is a platform independent object oriented querylanguage defined as part of the Java Persistence API specification. JPQL is used to make queries against entities stored in a relational database. It is heavily inspired by SQL , and its queries resemble SQL queries in syntax, but operate against JPA entity objects rather than directly with database tables. In addition to retrieving objects code SELECT code queries , JPQL supports set based code UPDATE code and code DELETE code queries. Examples Suppose we have JPA entity classes defined like this getter and setter methods omitted for simplicity source lang java Entity public ... source Hibernate QueryLanguage JPQL is based on the Hibernate Java Hibernate QueryLanguage HQL Hibernate QueryLanguage HQL , an earlier non standard querylanguage included in the Hibernate Java Hibernate object relational mapping library. Hibernate and the HQL were created before the JPA specification. As of Hibernate 3 JPQL is a subset of HQL. See also Object relational mapping Hibernate ... Full QueryLanguage Syntax from The Java EE 5 Tutorial http www.objectdb.com java jpa query JPA Queries and JPQL a chapter of the ObjectDB Manual http torpedoquery.org Type safe Hibernate HQL query engine TorpedoQuery Java Persistence API Category Query languages Category Data modeling languages Category Java enterprise platform cs JPQL hu Java Persistence QueryLanguage ... publisher private List Book books source Then a simple query to retrieve the list of all authors, ordered ... a FROM Author a WHERE lastName IS NULL OR LOWER a.lastName lastName Queryquery getEntityManager .createQuery ... more details
An information retrieval querylanguage is a querylanguage used to make queries into database, where the semantics of the query are defined not by a precise rendering of a formal syntax, but by an interpretation of the most suitable results of the query. Of importance in IR query languages is weighting and ranking, relevance orientation , semantic relativism and logic based probabilism. An example of an IR querylanguage is Contextual QueryLanguage CQL , a formal language for representing queries to Information Retrieval systems such as web indexes, bibliographic catalogs and museum collection information. See also Controlled vocabulary Free text searching Information retrieval SQL Document retrieval Text retrieval Database querylanguage External links http zing.z3950.org cql CQL Common QueryLanguage Database Category Query languages compu lang stub de Abfragesprache ... more details
Chess QueryLanguage CQL is a structured querylanguage which is designed to allow chess players and researchers to search for games, positions, problems, and studies in a quick and relatively easy manner. The user specifies the items that they are looking for, and the database in which to search. After running, the query creates a file in Portable Game Notation PGN format that contains all the games or positions matching the query criteria. The language is designed to be extremely flexible for example, a user does not have to define exactly the position or theme that they are looking for, but can modify the query so that it will find similar results within certain parameters. ref http www.xs4all.nl timkr chess2 cql.htm Chess QueryLanguage example Tim Krabbé s Chess Site Retrieved on 2007 07 04 ref Items and themes that CQL can search for include, but are not limited to ref http products.convekta.com 860 2 searches.htm CQL criteria convecta.com Retrieved on 2007 07 04 ref Player names Date and location of games Chess opening used Certain moves or Combination chess combinations of moves Certain pieces located on certain squares Patterns of pieces in certain locations Which pieces each side has left Complex criteria such as King chess king safety or certain pawn structure s. References references External links http www.rbnn.com cql CQL manual and download page http www.chessassistance.com News ChessAssistant8 Review.html A review of a chess analysis engine with CQL support Category Computer chess Category Query languages de Chess QueryLanguage fr Chess QueryLanguage ... more details
An RDF querylanguage is a computer language , specifically a querylanguage for database s, able to retrieve and manipulate data stored in Resource Description Framework format. SPARQL is emerging as the de facto RDF querylanguage, and is a W3C Recommendation . ref cite web url http www.w3.org TR rdf sparql query title SPARQL QueryLanguage for RDF last1 Prud hommeaux first1 Eric last2 Seaborne first2 Andy date 15 January 2008 work W3C publisher World Wide Web Consortium ref Released as a Candidate Recommendation in April 2006, it returned to Working Draft status in October 2006, due to open issues. It returned to Candidate Recommendation status in June 2007. ref cite web url http www.w3.org blog SW 2007 06 15 sparql is a candidate recommendation title SPARQL is a Candidate Recommendation ... web url http www.w3.org News 2007 item247 title Three SPARQL Proposed Recommendations SPARQL QueryLanguage for RDF Query Results XML Format Protocol for RDF date 13 November 2007 work W3C News in 2007 ... like SeRQL , SQL like, similar to RQL RVL Versa querylanguage , compact syntax non SQL like , solely implemented in 4Suite Python programming language Python XUL has a http developer.mozilla.org en docs ... Consortium ref Other RDF query languages DQL , XML based, queries and results expressed in DAML OIL .... XUL uses RDF extensively for databinding. Adenine programming language Adenine programming language written in RDF . External links http www.w3.org TandS QL QL98 pp rdfquery.html RDF Query specification http www.w3.org 2001 11 13 RDF Query Rules RDF querylanguage survey http web.archive.org web 20080702143156 http www.aifb.uni karlsruhe.de WBS pha rdf query A Comparison of some RDF Query Languages http rdfstore.sourceforge.net 2002 06 24 rdf query RDF query use cases, including querylanguage samples http www.w3.org TR rdf sparql query SparQL References Reflist Category RDF data access Category RDF Query languages Category Query languages ja RDF pl RDQL ... more details
POV date April 2011 Facebook QueryLanguage FQL is a querylanguage that allows querying Facebook user data by using a SQL style interface and without using the Application programming interface API . ref cite web url http developers.facebook.com docs reference fql title Facebook QueryLanguage FQL work Documentation publisher Facebook accessdate 2010 12 16 ref The beauty in FQL is the ability to query any Facebook data just like from an SQL database. In the following query, we pull four different types of data from a single table status where the user is me. When trying to do this yourself, you need to log into Facebook from your application and you also probably need to grant access to whatever data you want to pull. Due to the growing number of privacy concerns for social networks, most people have disabled most data to be shown to anyone thus your application will not be able to see it. However, once you login and grant access, you can see all data that you grant access to. source lang sql SELECT status id,message,time,source FROM status WHERE uid me source Once data is returned from an FQL query, it is found in JSON format by default. With JSON, it can be broken down and manipulated on a web page. References reflist Facebook navbox Category Facebook Category Query languages id Facebook QueryLanguage web software stub ... more details
The Molecular QueryLanguage MQL was designed to allow more complex, problem specific search methods in chemoinformatics . Vague to allow more ... than what? date July 2011 more than what? The querylanguage is based on an extended Backus Naur form EBNF using JavaCC . In contrast to Smiles arbitrary target specification SMARTS queries, MQL provides for the specification of spatial and physicochemical properties of atoms and bonds. Additionally, it can easily be extended to handle non atom based graphs, also known as reduced feature graphs. See also Smiles arbitrary target specification SMARTS International Chemical Identifier References E. Proschak, J. K. Wegner, A. Schü ller, G. Schneider, U. Fechner, Molecular QueryLanguage MQL A Context Free Grammar for Substructure Matching , J. Chem. Inf. Model., 2007 , 47 , 295 301. doi 10.1021 ci600305h External links http gecco.org.chemie.uni frankfurt.de mql Java Webstart application for MQL Query languages Category Cheminformatics ... more details
Multiple issues unreferenced June 2010 orphan February 2010 notability October 2011 distinguish Microsoft Access Access , the successor to ENGLISH programming language ENGLISH , is an English language English like query language used in the Pick operating system . The original name ENGLISH is something of a misnomer, as PICK s flexible dictionary structure meant that file and attribute names could be given aliases in any natural language. For instance the command SORT could be given the alias TRIEZ, the file CUSTOMER the alias CLIENT, the attribute BALANCE the alias BILAN and the particle BY the alias PAR. This would allow the database to be interrogated using the French language command string TRIEZ CLIENT PAR BILAN , resulting in a list of customers by balance. FOLDOC Category Query languages prog lang stub ... more details
Contextual QueryLanguage CQL , previously known as Common QueryLanguage , ref http www.loc.gov standards sru specs cql.html CQL the Contextual QueryLanguage Specifications SRU Search Retrieval via URL, Standards, Library of Congress ref is a formal language for representing queries to information retrieval systems such as search engine s, bibliography bibliographic catalogs and museum collection information. Based on the semantics of Z39.50 , its design objective is that queries be human readable and writable, and that the language be intuitive while maintaining the expressiveness of more complex querylanguage s. It is being developed and maintained by the Z39.50 Maintenance Agency, part of the Library of Congress . Examples of query syntax Simple queries blockquote tt dinosaur br complete dinosaur br title complete dinosaur br title exact the complete dinosaur tt blockquote Queries using Boolean logic blockquote tt dinosaur or bird br Palomar assignment and ice age br dinosaur not reptile br dinosaur and bird or dinobird br bird or dinosaur and feathers or scales br feathered dinosaur and yixian or jehol tt blockquote Queries accessing index publishing publication indexes blockquote tt publicationYear 1980 br lengthOfFemur 2.4 br bioMass 100 tt blockquote Queries based on the proximity of words to each other in a document blockquote tt ribs prox distance 5 chevrons br ribs prox unit sentence chevrons br ribs prox distance 0 unit paragraph chevrons tt blockquote Queries across multiple Dimension data warehouse dimensions blockquote tt date within 2002 2005 br dateRange encloses 2003 tt blockquote Queries based on Relevance information retrieval relevance blockquote tt ... of Congress Category Query languages Category Knowledge representation languages de Common QueryLanguage it Common QueryLanguage uk Common QueryLanguage ... zing.z3950.org cql intro.html A Gentle Introduction to CQL Query languages USGovernment sourceURL ... more details
About querylanguage vehicle Nissan Versa Versa is an RDF querylanguage , that is, a querylanguage for database s, able to retrieve and manipulate data stored in Resource Description Framework RDF format. Versa differs from most other RDF query languages, which are typically based on SQL or specialized XML vocabularies. Although the design of Versa was inspired by XPath , its compact, functional programming functional syntax also somewhat resembles Lisp programming language Lisp . As of 2006 , the only Versa implementation is in the Python programming language Python language, open source 4Suite XML framework. History and status Versa s origins can be traced to 2000, when professional XML consultancy Fourthought, Inc. began developing RIL, an open, XML based RDF Inference Language . RIL was implemented briefly in Fourthought s 4Suite Server product, which allowed for persistent storage and querying of an RDF model and associated XML document store. In October 2001, the query portion of RIL was spun off into a separate project named Versa, with the intent that after Versa stabilized, development would resume to establish RIL as a formal language for working Versa query results. RIL development never resumed, however inference abilities in 4Suite were easily handled by XSLT extensions and did not need a separate language. Versa initially had limits that required the language to be redesigned ... lpt a 2005 07 20 versa.html XML.com Versa Path Based RDF QueryLanguage irc irc.freenode.net ..., experimentation, and debugging http rdfstore.sourceforge.net 2002 06 24 rdf query RDF query use cases, including querylanguage samples Category Semantic Web Category Query languages Category RDF ... Get the URIs of all code edu Subject code s having a code rdfs label code matching code Russian language code type edu Subject rdfs label eq Russian language Get the URIs of all super code edu Subject ... wiki Russian language nowiki code traverse nowiki http en.wikipedia.org wiki Russian language nowiki ... more details
Yahoo querylanguage YQL is an SQL like querylanguage created by Yahoo as part of their Yahoo Developer Network Developer Network . YQL is designed to retrieve and manipulate data from API s through a single Web interface, thus allowing mashup digital mashups that enable developers to create their own applications. ref cite news url http www.pcworld.com businesscenter article 164067 yahoo extends yql web data query platform.html work PC World magazine PC World title Yahoo Extends YQL Web Data Query Platform date April 29, 2009 last Perez first Juan Carlos ref Initially launched in October 2008 with access to Yahoo APIs, ref cite news url http www.eweek.com c a Application Development Yahoo Launches YQL Execute Updates YSlow 660481 work eWeek title Yahoo Launches YQL Execute, Updates YSlow last Kolakowski first Nicholas date April 29, 2009 ref February 2009 saw the addition of open data table s from third parties such as Google Reader , the Guardian newspaper Guardian , and The New York Times . ref name rww Some of these APIs still require an API key to access them. On April 29th of 2009, Yahoo introduced the capability to execute the tables of data built through YQL using JavaScript run on the company s servers for free. ref name rww cite news url http www.readwriteweb.com archives theres a great amount of.php work ReadWriteWeb last O Dell first Jolie date May 2, 2009 title Developers Never Mind the APIs, Here s YQL Execute ref References Reflist External links http developer.yahoo.com yql Official site , including the YQL console See also WSO2 Mashup Server Yahoo Pipes Yahoo Inc. Query languages www stub Category Yahoo querylanguage Category Query languages ... more details
The Knowledge Query and Manipulation Language , or KQML , is a language and protocol for communication among software agents and knowledge based systems. It was developed in the early 1990s part of the DARPA knowledge Sharing Effort , which was aimed at developing techniques for building large scale knowledge bases which are shareable and reusable. While originally conceived of as an interface to knowledge based systems, it was soon repurposed as an Agent communication language . Work on KQML was led by Tim Finin of the University of Maryland, Baltimore County and Jay Weber of EITech and involved contributions from many researchers. The KQML message format and protocol can be used to interact with an intelligent system, either by an application program , or by another intelligent system. KQML s performatives are operations that agents perform on each other s knowledge and goal stores. Higher level interactions such as contract nets and negotiation are built using these. KQML s communication facilitators coordinate the interactions of other Multi agent system agents to support knowledge sharing. Experimental prototype systems support concurrent engineering, intelligent design, intelligent planning, and scheduling. KQML is superseded by FIPA ACL . See also Agent Communications Language Knowledge Interchange Format FIPA References FOLDOC External links http www.cs.umbc.edu kqml UMBC Agent Web Tim Finin Jay Weber Gio Wiederhold Michael Gensereth Richard Fritzzon Donald McKay James McGuire Richard Pelavin Stuart Shapiro Chris Beck http www.cs.umbc.edu KQML kqmlspec.ps DRAFT Specification of the KQML Agent Communication Language PostScript , June 15, 1993. Category Knowledge representation languages Category Multi agent systems de Knowledge Query and Manipulation Language fr Knowledge Query and Manipulation Language it KQML pt Knowledge Query and Manipulation Language ... more details
Orphan date February 2009 The Structured QueryLanguage Interface SQLI is the internal interface between an application and the Informix INFORMIX Online Dynamic Server . Starting from v10.0 Informix Dynamic Server also supports DRDA . External links http www 1.ibm.com support docview.wss?rs 630&context SSGU8G&dc DB520&uid swg21104625&loc en US&cs UTF 8&lang en&rss ct630db2 Setting SQLIDEBUG on the client side database software stub Category Application programming interfaces Category SQL data access ... more details
Unreferenced date November 2006 Object Definition Language ODL is the specification language defining the interface to object types conforming to the ODMG Object Model . Often abbreviated by the acronym ODL . This language s purpose is to define the structure of an Entity relationship diagram . Language Class declarations Interface name elements attributes, relationships, methods Element Declarations attributes type name relationships rangetype name Example Type Date Tuple year, day, month Type year, day, month integer Class Manager attributes id string unique name string phone string set employees Tuple Employee , Start Date Date Class Employee attributes id string unique name string Start Date Date manager Manager See also ODMG Object Data Management Group OQL ObjectQueryLanguage Category Object oriented programming Category Data modeling Compu lang stub ja pl Object Definition Language ... more details
. Description OCL is a descendant of Syntropy , a second generation object oriented analysis and design method. The OCL 1.4 definition specified a constraint language. In OCL 2.0, the definition has been extended to include general objectquerylanguage definitions. OCL statements are constructed ...The Object Constraint Language OCL is a declarative language for describing rules that apply to Unified Modeling Language UML models developed at IBM and now part of the UML standard. Initially, OCL was only a formal specification language extension to UML. ref Object Management Group OMG Object Constraint Language Specification , Chapter 7 of OMG Unified Modeling Language Specification , Version 1.3, March 2000 first edition ref OCL may now be used with any Meta Object Facility MOF Object Management Group OMG Metamodeling meta model , including UML. ref Object Management Group OMG Object Constraint Language OMG Available Specification Version 2.0 , May 2006 ref The Object Constraint Language is a precise text language that provides constraint and objectquery expressions on any MOF model or meta ... uml stub Category Unified Modeling Language Category Formal specification languages de Object Constraint Language es Lenguaje de especificaci n OCL2.0 fr Object Constraint Language it Object Constraint Language lt Object Constraint Language ja Object Constraint Language pl Object Constraint Language ... expressions. Relation OCL and UML OCL supplements Unified Modeling Language UML by providing expressions that have neither the ambiguities of natural language nor the inherent difficulty of using complex mathematics. OCL is also a navigation language for graph based models. OCL and MOF OCL makes a Meta Object Facility model more precise by associating assertions with its meta elements. OCL ... of Model transformation . The Object Management Group OMG has defined a specific standard .... Alternatives As a rule based validation language, Schematron may be considered as an alternative ... more details
Unreferenced date August 2009 The term object based language may be used in a technical sense to describe any programming language that uses the idea of encapsulating state and operations inside object computer science objects . Object based languages need not support Inheritance computer science inheritance or Subtype subtyping , but those that do are also said to be object oriented programming object oriented . Object based languages that do not support inheritance or subtyping are usually not considered to be true object oriented languages. Examples of object oriented programming languageobject oriented languages include Simula , Smalltalk , C whose object model was based on Simula s , Objective C whose object model was based on Smalltalk s , Eiffel programming language Eiffel , Python programming language Python , Ruby programming language Ruby , Java programming language Java , C Sharp programming language C , Visual Basic .NET and REALbasic an object oriented BASIC dialect . An example of a language that is object based but not object oriented is Visual Basic VB . VB supports both objects and classes, but not inheritance, so it does not qualify as object oriented. In practice, the term object based is normally applied only to those object based languages that are not also object oriented. Although all object oriented languages are also object based, by definition, they are not normally referred to as such. Fact date June 2008 Instead the terms object based and object oriented are normally used as mutually exclusive alternatives, rather than as categories that overlap. Sometimes the term object based is applied to prototype based languages , true object oriented languages ... object from which they inherit changed, at run time. Programming language Category Computer programming ... other template objects. An example of a commonly used prototype based language is JavaScript . Both object based and object oriented languages whether class based or prototype based may be statically ... more details
Object Modeling Language is a modeling language based on a standardized set of symbols and ways of arranging them to model part of an object orientation object oriented software design or system design . Some organizations use them extensively in combination with a software development methodology to progress from initial specification to an implementation plan and to communicate that plan to an entire team of developers and stakeholders. Because a modeling language is visual and at a higher level of abstraction than code, using models encourages the generation of a shared vision that may prevent problems of differing interpretation later in development. Often software modeling tools are used to construct these models, which may then be capable of automatic translation to code. History Some methodologies identify three roughly chronological generations of object modeling notations first , second and third generation . First generation In the first generation , isolated methodologists and small groups developed techniques that solved problems they saw first hand in Object Oriented OO development projects. The first generation includes techniques such as Booch method Class responsibility collaboration card CRC Object modeling technique OMT Object oriented software engineering OOSE Shlaer Mellor Yourdon Coad see Edward Yourdon The first generation languages were co developed and very closely tied with specific object oriented methodologies usually with the same name. It was often difficult to determine whether the notation or methodology was being referred to. Second generation The second generation recognized that many best practices were scattered among the fragmented OO methodology ... consists of credible attempts at this single industry standard language, with Unified Modeling Language ... for a wide range of development methods. See also Modeling language References noref date August 2008 Category Object oriented programming fa ... more details
Object Description Language ODL was the original interface definition language created by Microsoft for specifying interfaces to be used in OLE Automation . It was a superset of the OMG IDL . ref cite book title Systems development methods for the next century author W. Gregory Wojtkowski year 1997 page 19 ref ref cite book title Systems development methods for databases, enterprise modeling, and workflow author Wita Wojtkowski year 1999 page 92 ref ref cite book title Active Visual Basic 5.0 author Guy Eddon, Henry Eddon year 1997 page 106 publisher Microsoft Press isbn 1572315121 ref ref cite book title LabVIEW advanced programming techniques author Rick Bitter, Taqi Mohiuddin, Matt Nawrocki page 256 publisher CRC Press year 2001 isbn 0849320496 ref Microsoft provided a utility code mktyplib code to compile ODL files. ref cite book title ActiveX controls inside out author Adam Denning page 43 edition 2 year 1997 publisher Microsoft Press isbn 1572313501 ref The ODL was merged into the Microsoft Interface Definition Language . References reflist software stub Category Microsoft application programming interfaces ... more details
wiktionary query In general, a query is a form of question ing, in a line of inquiry. A query may also refer to The Queries , a set of 31 questions outlined by Isaac Newton beginning in 1704 Query Quaker , a question used for reflection and spiritual exercises among members of the Society of Friends Query complexity , a mapping from structures of one vocabulary to structures of another vocabulary In computing A precise request for information retrieval with database and information systems Querylanguage , a computer language used to make queries into databases and information systems Query string , in the world wide web , is an optional part of a Uniform Resource Locator URL that follows the first question mark ? Web search query , a query entered by users into web search engines Command query separation CQS , a concept in object oriented programming, especially in the Eiffel programming language jQuery , a lightweight JavaScript library that emphasizes interaction between JavaScript and HTML Persons with the surname Query Jeff Query , an American American Football football player Nate Query , a musician Russell Query, Web Developer See also Queue disambiguation Disambig de Query it Query nl Query ja pl Zapytanie bazy danych ru sr th ... more details
Notability date May 2010 TOM was an object oriented programming language developed in the 1990s that built on the lessons learned from Objective C . The main purpose of TOM was to allow for unplanned reuse of code via a well developed extension mechanism. This concept was introduced seemingly by accident in Objective C and later proved to be of wide use, and was applied aggressively in TOM. The primary changes in TOM are the addition of multiple inheritance , tuples as a first class part of the language, cleaner syntax, free of the C programming language C requirements for header files and pre compiler commands, and the ability to use categories the re use mechanism to include anything. It is this latter ability that represents the whole idea . Unlike Objective C s categories that allowed only new methods to be built onto existing classes, TOM allowed the addition of class and instance variables, new methods, even new superclasses. This results in the redefinition of class as a class is defined by its main definition and any extensions , these extensions have become a first class citizen of the language similarly to Ruby programming language Ruby . Development of the TOM language has ceased. External links official http gerbil.org tom Category Object oriented programming languages prog lang stub ... more details
wiktionary Object may refer to Object philosophy , a thing, being or concept Entity , something that is tangible and within the grasp of the senses As used in object relations theory object relations theories of psychoanalysis , that to which a subject relates. Object grammar , a sentence element, such as a direct object or an indirect object Abstract objectObject abstract , an object which does not exist at any particular time or place Mathematical objectObject mathematics , an abstract object arising in mathematics Group object , a generalization of a group built on more complicated structures than sets. Goal , an aim, target or objective Physical body or object, in physics, a collection of masses Object, an entity treated by mathematical category theory Categories, objects, and morphisms category theory 3D modeling 3D model , a representation of a physical object Property type National Register of Historic Places ObjectObject National Register of Historic Places , a classification used by the U.S. National Register of Historic Places object Russian GABTU military vehicle designations. In computing Object computer science , a language mechanism for binding data with methods that operate on that data Object oriented programming OOP , in which an object is an instance of a class or array Object file , the output of a compiler or other translator program also known as object code Object Information Processing , an information source for an information processor HTML element Images and objects HTML object element In popular culture Object Le D jeuner en fourrure , a sculpture by M ret Oppenheim Object , a song by The Cure on their 1979 album Three Imaginary Boys Objects from The Lost Room Objects from the 2006 television series The Lost Room Object , a song by Ween ... gl Obxecto ko io Objekto is Hlutur it Oggetto he ku Heyber mt O ett nl Object ja pl Obiekt pt Objeto desambigua o ro Obiect dezambiguizare ru simple Object sl Predmet ... more details
Query by Example QBE is a database querylanguage for relational database s. It was devised by Mosh M. Zloof at IBM Research during the mid 1970s, in parallel to the development of SQL . It is the first graphical querylanguage, using visual tables where the user would enter commands, example elements and conditions. Many graphical front ends for databases use the ideas from QBE today. Originally limited only for the purpose of retrieving data, QBE was later extended to allow other operations, such as inserts, deletes and updates, as well as creation of temporary tables. The motivation behind QBE is that a parser can convert the user s actions into statements expressed in a database manipulation language, such as SQL . Behind the scenes, it is this statement that is actually executed. A suitably comprehensive front end can minimize the burden on the user to remember the finer details of SQL, and it is easier and more productive for end users and even programmers to select tables and columns ... a querylanguage such as SQL . The software can automatically generate the queries for the user usually ... relational database front ends, notably Microsoft Access, which implements Visual Query by Example , as well as Microsoft SQL Server Enterprise Manager. It is also implement in several object database object oriented databases e.g. in db4o ref QBE in db4o http www.ibm.com developerworks java library ... , Starts With , Greater Than , and so forth. See also Microsoft Query by Example References references M. Zloof. Query by Example . AFIPS, 44, 1975. Raghu Ramakrishnan , Johannes Gehrke . Database ... dbbook openAccess thirdEdition qbe.pdf External links http pgfoundry.org projects qbe Query ... querycriteria examples Query by Example in Java using Hibernate Category Relational model Category Query languages compu lang stub ca Consulta mitjan ant exemple de Query by Example es B squeda mediante ejemplo fr Query By Example ja pl Query By Example pt Query by Example ru QBE ... more details
A query plan or query execution plan is an ordered set of steps used to access or modify information ... number of alternative ways to execute a given query, with widely varying performance. When a Information retrieval query is submitted to the database, the query optimizer evaluates some of the different, correct possible plans for executing the query and returns what it considers the best alternative. Because query optimizers are imperfect, database users and administrators sometimes need to manually examine and tune the plans produced by the optimizer to get better performance. Generating query ... query. Some packages feature tools which will generate a graphical representation of a query ... description of the query plan. Another mechanism for retrieving the query plan involves querying a virtual database table after executing the query to be examined. In Oracle, for instance, this can ... exploration of various attributes of the operators involved in the query plan, including the operator ... a sample query plan. Textual plans The textual plan given for the same query in the screenshot is shown ... , Expr1004 WITH UNORDERED PREFETCH Clustered Index Scan OBJECT AdventureWorks . HumanResources . Employee . PK Employee EmployeeID AS e Clustered Index Seek OBJECT AdventureWorks . Person . Contact ... as e . ContactID ORDERED FORWARD pre It indicates that the query engine will do a scan over .... In order to tune the query, the user must understand the different operators that the database may ... query results. Database tuning main Database tuning Reviewing the query plan can present opportunities ... is not properly taking advantage of existing indexes see query optimizer . Query tuning main Query optimizer The query optimizer will not always choose the best query plan for a given query. In some databases the query plan can be reviewed, problems found, and then the query optimizer given Hint SQL hints on how to improve it. In other databases alternatives to express the same query other queries ... more details
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