if (select count(*) from sys.syscolumns where tname='SpaMedicalOffices' and cname='AllowMultiGuests')=0 then

alter table SpaMedicalOffices
Add AllowMultiGuests integer default 0

end if

GO

COMMENT ON
COLUMN SpaMedicalOffices.AllowMultiGuests
is '0 pozvoliva edin gost po edno i sasto vreme 1- mnogo osti po edno i sasto vreme'