想找到低成本的关系模型工具,使我能够把第三类的逻辑模型绘制成基于EAV的实际模型。 是否有任何要点?
欧研中心未能遵守关系正常化规则,因此,没有任何关系模型工具支持它。
如果你的模式是3NF,那么没有理由在EAV中加以模仿。 保留在3个NF。
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