IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'BargehDetail' AND  COLUMN_NAME = 'Pro_ID_Unit')
begin
	alter table BargehDetail add Pro_ID_Unit	int references otherProperties(ID) not null default -1
end
;
update b set b.Pro_ID_Unit = k.Pro_ID_Vahed
from kala k
	inner join BargehDetail b on k.ID = b.Kal_ID
where
	b.Pro_ID_Unit = -1