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  • "Same As": Disabled (fastest) Apply to subjects only Apply to objects only Apply to both subjects and objects (recommended) Apply to subjects, objects and predicates (not recommended on big datasets) Apply to predicates only (special use cases only)

About: Q (programming language from Kx Systems)     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatProprietaryDatabaseManagementSystems, within Data Space : dbpedia.org associated with source document(s)

Type: Thinglanguagesoftwareyago:Abstraction100002137yago:ArtificialLanguage106894544yago:Code106355894yago:CodingSystem106353757yago:Communication100033020yago:DatabaseManagementSystem106588785yago:Language106282651yago:ProgrammingLanguage106898352yago:WikicatFunction-levelLanguagesyago:Writing106359877yago:WrittenCommunication106349220yago:Software106566077yago:WikicatProprietaryDatabaseManagementSystems New Facet based on Instances of this Class

Q is a programming language for array processing, developed by Arthur Whitney. It is proprietary software, commercialized by KX. Q serves as the query language for kdb+, a disk based and in-memory, column-based database. Kdb+ is based on the language k, a terse variant of the language APL. Q is a thin wrapper around k, providing a more readable, English-like interface. One of the use cases is financial time series analysis, as one could do inexact time matches. An example is to match the a bid and the ask before that. Both timestamps slightly differ and are matched anyway.