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Domain

#CS/Database

在 表 中某一 列 的取值范围，称为这个 列 的 值域。

Database System Concepts

For each attribute of a relation, there is a set of permitted values, called the domain of that attribute.[1]

  1. Abraham Silberschatz, Henry F. Korth, and S. Sudarshan, Database System Concepts, Seventh edition (New York, NY: McGraw-Hill, 2020). P39 ↩︎