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Contains the aggregate fields.

property AggFields: TFields;

Some TDataSet descendants, such as TClientDataSet, support aggregate fields. Aggregate fields summarize data over groups of records from the dataset (as opposed to calculated fields, which can only summarize data over the fields of a single record). AggFields is a collection of all such aggregate fields that are supported by the dataset.

Note:   The Fields property is a collection of all the dataset's fields that are not aggregate fields. Thus, AggFields and Fields are mutually exclusive collections of the dataset's fields. These two properties contain all of the dataset's fields between them.

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