IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'PrescriptionPeopleInfo' AND  COLUMN_NAME = 'EmploymentDate')
begin
	alter table dbo.PrescriptionPeopleInfo add EmploymentDate	int not null default 0
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'PrescriptionPeopleInfo' AND  COLUMN_NAME = 'EmploymentCode')
begin
	alter table dbo.PrescriptionPeopleInfo add EmploymentCode	nvarchar(200) not null default ''
end;