IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'karbar' AND  COLUMN_NAME = 'Taf_ID')
begin
	alter table karbar add Taf_ID	bigint references Tafsili(ID) null
end
go
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'karbar' AND  COLUMN_NAME = 'ExpireDate')
begin
	alter table karbar add [ExpireDate]	int not null default 0
end