Mine
public text v1 · immutable if (Query1.FieldByName('Sor_Szam').AsInteger < 1) and (Query1.FieldByName('Sor_Szam').IsNull = false) then
begin
Query1.Edit;
Query1.FieldByName('Sor_Szam').AsInteger:=1;
Query1.Post;
Query1.Next;