Data.DB.TAggregateField
| [–] Properties | |
|---|---|
| Type: class | |
| Visibility: public | |
| Source: Data.DB.pas Data.DB.hpp
| |
| Unit: Data.DB | |
| Parent: Data.DB | |
Delphi
TAggregateField = class(TField)
C++
class PASCALIMPLEMENTATION TAggregateField : public TField
Description
TAggregate field represents a maintained aggregate in a client dataset.
TAggregateField represents an aggregate value from a client dataset in a form that can be used by data-aware controls. Use the Fields editor on a ClientDataSet to create a persistent aggregate field to which a TDBText control can bind.
As with TAggregate, TAggregateField has an Expression property that represents a calculation summarizing the data in a set of records. When using aggregate fields, you do not need to explicitly create the corresponding aggregate object in the client dataset: the Fields editor creates that object when you create a persistent aggregate field.