Default value for the field.
Source position: db.pas line 476
|  published property TField.DefaultExpression : string | 
DefaultValue can be set to a value that should be entered in the field whenever the TDataset.Append or TDataset.Insert methods are executed. It should contain a valid SQL expression that results in the correct type for the field.
This feature is not yet implemented in FPC.
| 
 | Insert a new record at the current position. | |
| 
 | Append a new record to the data. | |
| TDataset.CustomConstraint |