primary key index

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English-Chinese computer dictionary (英汉计算机词汇大词典). 2013.

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  • Index (database) — A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of slower writes and increased storage space. Indexes can be created using one or more columns of a database table,… …   Wikipedia

  • Key Sequenced Data Set — A Key Sequenced Data Set (KSDS) is a type of data set used by the IBM VSAM computer data storage system. Each record in a KSDS data file is embedded with a unique key. A KSDS consists of two parts, the data component and a separate index file… …   Wikipedia

  • Primary color — Primary colors are sets of colors that can be combined to make a useful range (gamut) of colors. For human applications, three are often used; for additive combination of colors, as in overlapping projected lights or in CRT displays, the primary… …   Wikipedia

  • Primary source — [ [http://www.lib.umd.edu/guides/primary sources.html Primary, Secondary and Tertiary Sources, UM Libraries] ] [ [http://www.library.jcu.edu.au/LibraryGuides/primsrcs.shtml JCU Primary, Secondary Tertiary Sources] ] is a term used in a number of… …   Wikipedia

  • Primary ciliary dyskinesia — Classification and external resources Normal cilia (A) cilia in Kartagener s syndrome (B). ICD 10 Q …   Wikipedia

  • primary — pri·ma·ry 1 / prī ˌmer ē, mə rē/ adj 1: of first rank, value, or importance 2: belonging to the first group or order in successive divisions, combinations, or ramifications pri·mar·i·ly /prī mer ə lē/ adv primary 2 n pl …   Law dictionary

  • key — adj: of vital importance (as in a business organization) esp. so as to be specially insured to the benefit of an employer key man key employee insurance Merriam Webster’s Dictionary of Law. Merriam Webster. 1996 …   Law dictionary

  • key — [adj] essential, important basic, chief, crucial, decisive, fundamental, indispensable, leading, main, major, material, pivotal, primary, principal, vital; concept 568 Ant. inessential, insignificant, nonessential, unimportant key [n1] item that… …   New thesaurus

  • Primary education — A large elementary school in Magome, Japan …   Wikipedia

  • key — I (New American Roget s College Thesaurus) n. answer, solution, codebook, decipherment; pitch, tonality, register; cay. See sound, opening, interpretation, music, cause, color, instrumentality. keyed up II (Roget s IV) modif. Syn. esse …   English dictionary for students

  • Barack Obama presidential primary campaign, 2008 — Infobox U.S. federal election campaign, 2008 committee = Obama for America campaign = U.S. presidential election, 2008 candidate = Barack Obama U.S. Senator 2005–present status = Announced February 10, 2007 Presumptive nominee June 3, 2008… …   Wikipedia

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