IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'license' AND  COLUMN_NAME = 'Dom_ID_Guild')
begin
	alter table dbo.license add Dom_ID_Guild	int references dbo.Domain(ID) not null default -1
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'license' AND  COLUMN_NAME = 'Dom_ID_Startup')
begin
	alter table dbo.license add Dom_ID_Startup	int references dbo.Domain(ID) not null default -1
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'license' AND  COLUMN_NAME = 'ComputerName')
begin	
	alter table dbo.license add ComputerName	nvarchar(100) null
end;