Set filter for database

ou may use Filter and Filtered properties of Table component. But for more difficult queries, you may use OnFilterRecord event of TTable. This example shows, how to show records, where AREA>1500000.

procedure TForm1.Table1FilterRecord(DataSet: TDataSet;
  var Accept: Boolean);
var
  Value: Integer;
begin
  Value:=Table1['Area'];
  Accept:=Value>1500000;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Table1.Filtered:=True;
end;