Start by creating a physical data model with a SAMPLE database, creating a SAMP schema, and creating some tables and columns.

首先创建一个物理数据模型，模型中包括一个SAMPLE数据库、一个SAMP模式和一些表和列。

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Trying to create a comprehensive data model at the start of the project.

在项目的开始，试图创建全面的数据模型。

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Prior application knowledge based on the data model can be a good place to start.

先前基于数据模型的应用程序知识便是很好的起点。

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Instead of predetermining a model and then using the available data to test it, we start with the raw data and see where it leads.

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