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。
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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