Many selective informationbase programs were designed around the physical cards: the maximum information that could be encoded on a lap card became the length of a standard record. In 1970 Ted Codd enquiryed and evidence for IBM a mathematically consistent and complete way of managing and retrieving information. This inquiry provided what is known today as the relational model of data for large shared databanks. http://www.oracle.com/corporate/investor_relations/news/history.htm. To learn ...If you lack to get a full essay, order it on our website: OrderEssay.net
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