Database, logical and conceptual model

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Can help me in these logical and conceptual models, wanted to know if this right or wrong the one I did to deliver, is a car rental. inserir a descrição da imagem aqui

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database relational-model
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    Without knowing the requirements we can not say, the general idea is more or less right, but it can be very wrong if the requirement is different. The most obvious mistake there is the diaria be the type double, this gives problem. https://answall.com/q/219211/101. What can be said that it is a very naive model of the real problem.

  • then, apart from this daily mistake, the model would already be + or - correct? , the teacher would accept?

  • 1

    I can’t tell you what he’d accept, maybe he’d even accept double. I don’t even know what he asked for. Even if he accepts I think you don’t understand what modeling is. Modeling is to understand the problem you have at hand and create a suitable solution for it.

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