IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Campaign' AND  COLUMN_NAME = 'Dom_ID_Trunk')
begin
	alter table Campaign add Dom_ID_Trunk	int references Domain(ID) not null default 1530 -- نوع ترانک
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Campaign' AND  COLUMN_NAME = 'RetryInterval')
begin
	alter table Campaign add RetryInterval	int not null default 0 -- تاخیر تلاش مجدد
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Campaign' AND  COLUMN_NAME = 'CallInterval')
begin
	alter table Campaign add CallInterval	int not null default 0 -- فاصله بین هر تماس
end;