master-detail relationship and count

Hi folks.

I've got a master detail relationship where I have a railway route table 
listing landmarks along the route,  and a Links table listing URL's 
associated with that landmark. Listed below:

How can I do a query showing the landmark ID, the landmark name, and a count 
of links associated with that  landmark.  Below is a SQL statement that 
although is illegal, gives a good idea of what I'm looking for.

select r.rtid, r.rtname, l.count(*) from route r, links l where l.lktype = 'R' 
and l.lklid = r.rtid;

nymr=# \d route                                    Table "route"Attribute  |         Type          |
Modifier
 
------------+-----------------------+--------------------------------------------------rtid       | integer
 | not null default 
 
nextval('route_rtid_seq'::text)rtmile     | integer               | not nullrtyards    | integer               | not
nullrtname    | character varying(40) |rtspeed    | integer               |rtgradient | integer
|rtsection | integer               |rtphone    | character(1)          |rtcomments | text                  |
 
Indices: route_index,        route_rtid_key

nymr=# select r.rtid, l.count(*) from route r, links l where
nymr=# \d links                                   Table "links"Attribute |         Type          |
Modifier
-----------+-----------------------+-------------------------------------------------lkid      | integer
|not null default 
 
nextval('staff_sid_seq'::text)lkdesc    | character varying(40) |lkurl     | character varying(40) |lktype    |
character(1)         |lklid     | integer               |
 
Index: links_lkid_key

lktype indicates the link type - 'R' indicates a route entry
lklid indicates the link ID. For a 'R' it is the rtid of the route entry
-- 
Gary Stainburn
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