What Is The Meaning Of & ~

Hi,

I cant understand what is the meaning of & ~. I have seen the same in following query. Could any one explain me please.


select p.action & ~convert(int, 0x10000000), N'column' = col_name(p.id, p.colid), p.uid, N'username' = user_name(p.uid),
p.protecttype, o.name, N'owner' = user_name(o.uid), p.id, N'grantor' = user_name(p.grantor)
from #output p, dbo.sysobjects o
where o.id = p.id
order by p.uid, p.id, p.protecttype, p.action

Thanks
-- Krishna