查询查询结果

Question

http://sqlfiddle.com/#!3/e4891/1

对于上面得到的查询（它转动数据）我想再运行一个选择条件。

例如

从“上述轮回查询结果”

中选择（C1＆amp; C2）

是否可以这样做？ CTE会在这里帮忙吗？ SQL Server 2008及更高版本。

Answer 1

试试这个：

WITH Data AS 
(
  select *
 from 
 (
    select MemId, Condition_id, condition_result
    from t
 ) x
 pivot
 (
    sum(condition_result)
    for condition_id in ([C1], [C2], [C3], [C4])
 ) p
)
SELECT C1, C2
  FROM Data

SQLFiddle：http://sqlfiddle.com/#!3/e4891/3

Answer 2

将您的选择更改为仅选择所需的字段：

select [C1], [C2]
  from 
  (
      select MemId, Condition_id, condition_result
      from t
  ) x
  pivot
  (
      sum(condition_result)
      for condition_id in ([C1], [C2], [C3], [C4])
  ) p

OR

;with cte
as
(
  select *
  from 
  (
      select MemId, Condition_id, condition_result
      from t
  ) x
  pivot
  (
      sum(condition_result)
      for condition_id in ([C1], [C2], [C3], [C4])
  ) p
)
select [C1], [C2]
from cte