For example, flat files should have a trailer record telling the total of records in the file and an aggregate of the key fields.

例如，普通文件应该有一条尾记录，说明文件中的总记录数，以及关键字段的合计。

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For example, flat files should have a trailer record telling the total of records in the file and an aggregate of the key fields.

例如，普通文件应该有一条尾记录，说明文件中的总记录数，以及关键字段的合计。

youdao