每个文件的内容都是单个客户数据记录。

The content of each file is a single customer data record.

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这个数据库实际上分为两个数据库：文件数据库记录p seudo环境(文件、所有者、模式)和日志数据库记录事件。

The database is actually split into two databases: a file database that records the pseudo environment (files, ownership, modes), and a log database that records events.

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要将数据加载到数据库中，需要定义加载映射，以将来自数据文件的记录中的字段与数据表中的列相关联。

To load data into a database, you define a load map, which associates fields from records in a data file to columns in a database table.

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