Sql 如何在查询中取消PIVOT结果？

我正在使用MS SQL 2005

以下是查询：

SELECT allow_r, allow_h, allow_c, sponsorid
FROM Sponsor 
WHERE sponsorid = 2

结果是：

allow_r   allow_h     allow_c    sponsorid
---------- ---------- ---------- -----------
1          1          0          2

我需要它是：

allow_r   1    2
allow_h   1    2

---

allow_c不应出现在结果中，因为它的值为0。看起来您实际上想要将列转换为行的数据。您可以使用以下选项：

select col, value, sponsorid
from sponsor
unpivot
(
  value
  for col in (allow_r, allow_h, allow_c)
) unpiv
where sponsorid = 2
  and value <> 0

select 'allow_r' as col, allow_r as value, sponsorid
from sponsor
where sponsorid = 2
  and allow_r <> 0
union all
select 'allow_h' as col, allow_h as value, sponsorid
from sponsor
where sponsorid = 2
  and allow_h <> 0
union all
select 'allow_c' as col, allow_c as value, sponsorid
from sponsor
where sponsorid = 2
  and allow_c <> 0;

|     COL | VALUE | SPONSORID |
-------------------------------
| allow_r |     1 |         2 |
| allow_h |     1 |         2 |