You can select the most effective data base type for each domain to reduce operation cost and to provide the right level of availability for each domain.

您可以为每个域选择最有效的数据基础类型，以降低操作成本并为每个域提供正确的可用性级别。

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A domain is a class or type and indicates the rules, syntax, and semantics for a piece of data (for example, it must be an integer, float, conform to a picture, and so on).

域是类或类型并表示数据的规则、语法及语义(例如，它必需是整型、浮点型、图片类型等等)。

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Note that this atomic domain is defined as DOUBLE, while the data type for the database column (determined using reverse engineering) is a BIGINT.

注意，这个原子域被定义为 DOUBLE，而数据库列（由反向工程决定）的数据类型为 BIGINT。

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