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

alter table Services
Add TimeSteps integer default 0

end if

GO

if (select count(*) from Registers where RegisterName='TimeStep')=0 then

insert into Registers(RegisterName,IntStojnost,Komentar) values('TimeStep',5,'');

end if