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  3. In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital s

In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital s

admin2009-02-24  59
问题 In developing a hospital database, it is determined that on the average, each patient will have 6 treatments during a hospital stay.The average length of a stay is three days.The hospital has 1000 beds.There are on the average 800 patients occupying beds each day.The relationship between PATIENT and TREATMENT is 1: M.The relationship between PATIENT and BED is 1:1, conditional.If treatment record occurrences are archived as soon as a patient is discarded from the hospital, how many occurrences of the TREATMENT records will be stored in the TREATMENT database file on the average?
选项 A、6,000
B、4,800
C、18,000
D、1,600
答案D
解析
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原NCRE全国计算机四级

NCRE全国计算机四级

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