做两个查询到1周的结果与2列设置

Question

说我有一个表，如下所示：

Person Table 

ID AccountID Name 
1  6  Billy 
2  6  Joe 
3  6  Tom 
4  8  Jamie 
5  8  Jake 
6  8  Sam 

我有两个疑问，我自己知道工作：

Select Name Group1 from person where accountid = 6 

Select Name Group2 from person where accountid = 8 

但我想要一个结果集看起来像这样：

Group1 Group2 

Billy Jamie 
Joe  Jake 
Tom  Same 

Answer 1

您可以使用row_number()分配于各行的不同值，ANS然后用FULL OUTER JOIN加入两个子查询：

select t1.group1, 
    t2.group2 
from 
(
    select name group1, 
    row_number() over(order by id) rn 
    from yourtable 
    where accountid = 6 
) t1 
full outer join 
(
    select name group2, 
    row_number() over(order by id) rn 
    from yourtable 
    where accountid = 8 
) t2 
    on t1.rn = t2.rn; 

见SQL Fiddle with Demo

Answer 2

我同意你应该做这个客户端。但它可以在T/SQL来完成：

select G1.Name as Group1 
,  G2.Name as Group2 
from (
     select row_number() over (order by ID) as rn 
     ,  * 
     from Group 
     where AccountID = 6 
     ) as G1 
full outer join 
     (
     select row_number() over (order by ID) as rn 
     ,  * 
     from Group 
     where AccountID = 8 
     ) as G2 
on  G1.rn = G2.rn 
order by 
     coalesce(G1.rn, G2.rn)