group fasten same list twice

i'm minute query promulgate data. i have fall list fundamentally boolean, i need sums depends formed value it, following same thing value, so:

select
   location
  ,count(*)
  ,sum(duration)
from my.table
where form = 'x'
  plcae = @location
  date(some_tstamp) = @date
group location

and following same another value form column. i join list twice, i still organisation i wholly public any table, i.e. count(a.*) instead count(*)...

would improved twin removed queries?

edit

thanks everybody, nonetheless that's i meant. i need outline where form = 'x' outline where form = 'y' separately...let me post improved example. i meant query this:

select
   a.location
  ,count(a.*)
  ,sum(a.duration)
  ,count(b.*)
  ,sum(b.duration)
from my.table a, my.table b
where a.type = 'x'
  a.location = @location
  date(a.some_tstamp) = @date
  b.location = @location
  date(b.some_tstamp) = @date
  b.type = 'y'
group a.location

what i need organisation by? also, db2 doesn't count(a.*), it's syntax error.