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关系范式
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关系范式
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normal form,NF
关系范式
符合某一种级别要求的关系模式的集合。简称范式(normal form)。英文缩写NF。
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drainage oil
drainage pattern
drainage pavement
drainage pipe
drainage pipe network
drainage process
drainage protection of pipelines
drainage reception area
drainage sluice
drainage system
drainage system fire fighting
drainage system of hydropower station
drainage system planning in irrigation district
drainage system treatment equipment
drainage therapy
drainage tube
drainage volume standard
drainage water quality standards
drain diffusion
drain ditches in the field
drain [electrode]
drain electrode
drainer
draining of pipeline
draining south and supplementation north method
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