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A candidate key is a minimal superkey, [1] i.e., a superkey that doesn't contain a smaller one. Therefore, a relation can have multiple candidate keys, each with a different number of attributes. [2] Specific candidate keys are sometimes called primary keys, secondary keys or alternate keys.
The Keys to the White House, also known as the 13 keys, is a prediction system for determining the outcome of presidential elections in the United States. It was developed by American historian Allan Lichtman and Russian geophysicist Vladimir Keilis-Borok in 1981, adapting methods that Keilis-Borok designed for earthquake prediction .
This page was last edited on 24 June 2018, at 22:07 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
Slash notation in 4/4 with a slash on each beat under a i7 iv7-V7 chord progression in B ♭ minor. Slash notation is a form of purposefully vague musical notation which indicates or requires that an accompaniment player or players improvise their own rhythm pattern or comp according to the chord symbol given above the staff.
today's connections game answers for wednesday, december 11, 2024: 1. utopia: paradise, seventh heaven, shangri-la, xanadu 2. things you shake: hairspray, magic 8 ...
WASHINGTON (Reuters) -FBI Director Christopher Wray and Homeland Security Secretary Alejandro Mayorkas declined to appear publicly on Thursday before a U.S. Senate committee to discuss national ...
There is a multi-attribute unique identifier/candidate key: "Manufacturer" and "Model". {Manufacturer country} is functionally dependent (predictable) on {Manufacturer}. {Manufacturer} is a proper subset of the {Manufacturer, Model} candidate key. {Manufacturer country} is not part of a candidate key, so it is a non-prime attribute.
A realtor in Georgia was killed in a suspected DUI crash that allegedly involved an underage illegal immigrant from Honduras who ran through a red light and struck the driver, going 100 miles per ...