Data type for the field.
Source position: db.pas line 215
|  published property TFieldDef.DataType : TFieldType | 
DataType contains the data type of the field's contents. Based on this property, the FieldClass property determines what kind of field class must be used to represent this field.
| 
 | TField class used for this fielddef. | |
| 
 | Create TField instance based on definitions in current TFieldDef instance. |