单选

某公司数据库中的元件关系模式为P(元件号,元件名称,供应商,供应商所在地,库存量),函数依赖集F如下所示:F={元件号→元件名称,(元件号,供应商)→库存量,供应商→供应商所在地}元件关系的主键为(54),该关系存在冗余以及插入异常和删除异常等问题。为了解决这一问题需要将元件关系分解(55),分解后的关系模式可以达到(56)。

  • A.元件1(元件号,元件名称,库存量)、元件2(供应商,供应商所在地)
  • B.元件1(元件号,元件名称)、元件2(供应商,供应商所在地,库存量)
  • C.元件1(元件号,元件名称)、元件2(元件号,供应商,库存量)、元件3(供应商,供应商所在地)
  • D.元件1(元件号,元件名称)、元件2(元件号,库存量)、元件3(供应商,供应商所在地)、元件4(供应商所在地,库存量)
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