sql - 水平联合选择语句

Question

假设我的选择语句的结果如下(我有 5 个):

   Id  Animal AnimalId
    1   Dog     Dog1
    1   Cat     Cat57

   Id  Transport TransportId
    2   Car        Car100
    2   Plane      Plane500

我想得到如下结果:

   Id  Animal AnimalId    Transport    TransportId
    1   Dog     Dog1
    1   Cat     Cat57
    2                        Car          Car100
    2                       Plane         Plane500 

我可以做的是创建一个表变量并指定所有可能的列并将每个选择语句中的记录插入其中。但也许像 PIVOT 这样更好的解决方案？
编辑

查询:第一个:Select CategoryId as Id, Animal, AnimalId from Animal
第二:Select CategoryId as Id, Transport, TransportId from Transport

Answer 1

这样怎么样，如果您需要它们在同一行中，这将获取每一行的 row_number() 并加入这些行:

select a.id,
  a.aname,
  a.aid,
  t.tname,
  t.tid
from 
(
  select id, aname, aid, row_number() over(order by aid) rn
  from animal
) a
left join
(
  select id, tname, tid, row_number() over(order by tid) rn
  from transport
) t
  on a.rn = t.rn

见 SQL Fiddle with Demo

如果你不需要它们在同一行，那么使用 UNION ALL:

select id, aname, aid, 'Animal' tbl
from animal
union all
select id, tname, tid, 'Transport'
from transport

见 SQL Fiddle with Demo

编辑 #1，这是一个带有 UNPIVOT 和 PIVOT 的版本:

select an_id, [aname], [aid], [tname], [tid]
from
(
  select *, row_number() over(partition by col order by col) rn
  from animal
  unpivot
  (
    value
    for col in (aname, aid)
  ) u
  union all
  select *, row_number() over(partition by col order by col) rn
  from transport
  unpivot
  (
    value
    for col in (tname, tid)
  ) u
) x1
pivot
(
  min(value)
  for col in([aname], [aid], [tname], [tid])
) p
order by an_id

见 SQL Fiddle with Demo