This paper introduces the fan and chasm traps in ER models, analyses the causes and problems of connection traps, and presents the solution for the problems.
介绍了实体-联系模型中出现的扇形陷阱和深坑陷阱，分析了两种连接陷阱产生的原因及导致的后果并提出了问题的解决方法。
This paper introduces the fan and chasm traps in ER models, analyses the causes and problems of connection traps, and presents the solution for the problems.
介绍了实体-联系模型中出现的扇形陷阱和深坑陷阱，分析了两种连接陷阱产生的原因及导致的后果并提出了问题的解决方法。
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