IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'GardesheChek' AND COLUMN_NAME = 'FC_ID') begin alter table GardesheChek add FC_ID int references Finance_Cycle(ID) not null default -1 end go IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'GardesheChek' AND COLUMN_NAME = 'Pro_ID_VahedMali') begin alter table GardesheChek add Pro_ID_VahedMali int references OtherProperties(ID) not null default -1 end