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  • 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 language — Query languages are computer languages used to make queries into databases and information systems. Broadly, query languages can be classified according to whether they are database query languages or information retrieval query languages. The… …   Wikipedia

  • Query by Example — (QBE) is a database query language for relational databases. It was devised by Moshè M. Zloof at IBM Research during the mid 1970s, in parallel to the development of SQL. It is the first graphical query language, using visual tables where the… …   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

  • Query flooding — is a method to search for a resource on a P2P network. It is simple but scales very poorly and thus is rarely used. Early versions of the Gnutella protocol operated by query flooding; newer versions use more efficient search algorithms.OperationA …   Wikipedia

  • Query by humming — (QbH) is a music retrieval system that branches off the original classification systems of title, artist, composer, and genre. It normally applies to songs or other music with a distinct single theme or melody. The system involves taking a user… …   Wikipedia

  • Query — Que ry, n.; pl. {Queries}. [L. quaere, imperative sing. of quaerere, quaesitum to seek or search for, to ask, inquire. Cf. {Acquire}, {Conquer}, {Exquisite}, {Quest}, {Require}.] 1. A question; an inquiry to be answered or solved. [1913 Webster]… …   The Collaborative International Dictionary of English

  • 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 string — In the World Wide Web, a query string is the part of a URL that contains data to be passed to web applications such as CGI programs.When a web page is requested via the Hypertext Transfer Protocol, the server locates a file in its file system… …   Wikipedia

  • Query Throughput — In Computer Science, Query Throughput (QthD) is a measurement used to determine the performance of a database system. The throughput metric is a classical throughput measure characterizing the ability of the system to support a multi user… …   Wikipedia

  • Query — In general, a query is a form of questioning, 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 (complexity), a mapping from structures of one vocabulary to… …   Wikipedia

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