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Primary key

In database design, a primary key is a value that can be used to look up a particular row in a table. Examples are names in a telephone book (to look up telephone numbers), words in a dictionary (to look up definitions), and Dewey Decimal Numbers (to look up books in a library).



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Dennis Gabor

... Gabor - Wikipedia <<Up     Contents Dennis Gabor Dennis Gabor (Gábor Dénes) (1900-1979) was a Hungarian physicist. He invented holography in ...

 
 
 
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