请问这个简单的SQL语句怎么写？

[ocool]

第一个表Port结构：
ID(int4) Name
内容 1 SHANGHAI
2 TIANJIN
3 QINGDAO

第二个表Lane结构：
ID(int4) LaneID PortID1 PortID2 PortID3
内容 1 1 1 2 3

现在根据Lane的LaneID值（例如1），返回Port1,Port2,Port3的Name，就是SHANGHAI,TIANJIN,QINGDAO，
请问这个简单的SQL语句怎么写？

[yyaoi]

select a.laneid,a.portid1,b.name from lane a,port b
where a.portid1=b.id
union select a.laneid,a.portid2,b.name from lane a,port b
where a.portid2=b.id
union select a.laneid,a.portid3,b.name from lane a,port b
where a.portid3=b.id

[zjcxc]

select id,lanid
,portname1=(select name from Port where id=a.PortID1)
,portname2=(select name from Port where id=a.PortID2)
,portname3=(select name from Port where id=a.PortID3)
from Lane a

[vileboy]

select p1.name,p2.name,p3.name from
port as p1 right join
port as p2 right join
port as p3 right join
lane as la
on p3.id=la.protid3
on p2.id=la.protid2
on p1.id=la.protid1

[vileboy]

再改:
select p1.name as port1 ,p2.name as port2,p3.name as port3 from
port as p1 right join
port as p2 right join
port as p3 right join
lane as la
on p3.id=la.protid3
on p2.id=la.protid2
on p1.id=la.protid1

[azsoft]

zjcxc(邹建):

select id,lanid
,portname1=(select name from Port where id=a.PortID1)
,portname2=(select name from Port where id=a.PortID2)
,portname3=(select name from Port where id=a.PortID3)
from Lane a

[ocool]

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