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Nested Relational Algebra

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  • Nested set model — The nested set model is a particular technique for representing nested sets (also known as trees or hierarchies) in relational databases. The term was apparently introduced by Joe Celko; others describe the same technique without naming it [1] or …   Wikipedia

  • NRA — National Rifle Association (Governmental » Military) * National Roads Authority (Governmental » Transportation) * National Roads Authority (Governmental) * Nuclear Reaction Analysis (Academic & Science » Electronics) * National Recovery Act… …   Abbreviations dictionary

  • Tuple — This article is about the mathematical concept. For the musical term, see Tuplet. For the achievement in Association Football, see The Sextuple. In mathematics and computer science, a tuple is an ordered list of elements. In set theory, an… …   Wikipedia

  • Database normalization — In the design of a relational database management system (RDBMS), the process of organizing data to minimize redundancy is called normalization. The goal of database normalization is to decompose relations with anomalies in order to produce… …   Wikipedia

  • Feature Oriented Programming — (FOP) or Feature Oriented Software Development (FOSD) is a general paradigm for program synthesis in software product lines. FOSD arose out of layer based designs of network protocols and extensible database systems in the late 1980s cite web |… …   Wikipedia

  • Query optimizer — The query optimizer is the component of a database management system that attempts to determine the most efficient way to execute a query. The optimizer considers the possible query plans for a given input query, and attempts to determine which… …   Wikipedia

  • MongoDB — Developer(s) 10gen Initial release 2009 Stable release 2.0.1 / October 22, 2011; 31 days ago ( …   Wikipedia

  • Flat file database — A flat file database describes any of various means to encode a data model (most commonly a table) as a plain text file. Flat filesA flat file is a plain text file which usually contains one record per line. [Citation last = Fowler first = Glenn… …   Wikipedia

  • Database model — A database model is the theoretical foundation of a database and fundamentally determines in which manner data can be stored, organized, and manipulated in a database system. It thereby defines the infrastructure offered by a particular database… …   Wikipedia

  • Join (SQL) — An SQL join clause combines records from two or more tables in a database.[1] It creates a set that can be saved as a table or used as is. A JOIN is a means for combining fields from two tables by using values common to each. ANSI standard SQL… …   Wikipedia

  • View (database) — In database theory, a view consists of a stored query accessible as a virtual table in a relational database or a set of documents in a document oriented database composed of the result set of a query or map and reduce functions. Unlike ordinary… …   Wikipedia

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