join query

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• 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

• Query optimization — is a function of many relational database management systems in which multiple query plans for satisfying a query are examined and a good query plan is identified. This may or not be the absolute best strategy because there are many ways of doing …   Wikipedia

• Join, or Die — is a famous political cartoon created by Benjamin Franklin and first published in his Pennsylvania Gazette on May 9, 1754.cite web|url=http://lcweb2.loc.gov/cgi bin/query/r?pp/PPALL:@field(NUMBER+@1(cph+3a12149)) title=Join or Die accessdate=May… …   Wikipedia

• Query by Example — (Suche anhand von Beispielen) bezeichnet eine relationale Datenbankabfragesprache, die von Moshé M. Zloof bei IBM parallel zu System R entwickelt wurde. Sie beruht im Wesentlichen auf dem Bereichskalkül. Dabei wird die Abfrage nicht wie in SQL… …   Deutsch Wikipedia

• Join — Join, n. 1. (Geom.) The line joining two points; the point common to two intersecting lines. Henrici. [1913 Webster] 2. The place or part where objects have been joined; a joint; a seam. [PJC] 3. (Computers) The combining of multiple tables to… …   The Collaborative International Dictionary of English

• 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

• Query plan — A query plan (or query execution plan) is a set of steps used to access or modify information in a SQL relational database management system. This is a specific case of the relational model concept of access plans.Since SQL is declarative, there… …   Wikipedia

• Query By Example — L interface QBE de Kexi Query By Example (abr. QBE, en français interrogation par l exemple), est un type d interface utilisateur servant à effectuer des recherches dans des bases de données relationnelles. Le principe d une interface QBE est que …   Wikipédia en Français

• Join Selection Factor — O Connell (2005, 5.10) defines this as [t] he percentage (or fraction, whichever you choose) of records in one file that will be joined with records of another file . This can be calculated when two database tables are to be joined. It is… …   Wikipedia

• Language Integrated Query — LINQ redirects here. For the card game, see Linq (card game). Language Integrated Query Influenced by SQL, Haskell Language Integrated Query (LINQ, pronounced link ) is a Microsoft .NET Framework component that adds native data querying… …   Wikipedia

• Structured Query Language — SQL (das Kürzel für Structured Query Language; offizielle Aussprache [ɛskjuːˈɛl], häufig auch [ˈsiːkwəl] →SEQUEL), ist eine Datenbanksprache zur Definition, Abfrage und Manipulation von Daten in relationalen Datenbanken. SQL ist von ANSI und ISO… …   Deutsch Wikipedia