十进制转换成二进制(如8转成1000)

alter proc prc_num @num bigint
as
declare @numstr varchar(50)
set @numstr=''
while (@num<>0)
begin
set @numstr=@numstr+convert(char(1),@num%2)
set @num=@num/2
end
select reverse(@numstr)

exec prc_num 8