TSQL PIVOT多列

Question

我有下表，但不确定是否可以旋转它并保留所有标签。

RATIO               RESULT   SCORE   GRADE
Current Ratio       1.294    60      Good
Gearing Ratio       0.3384   70      Good
Performance Ratio   0.0427   50      Satisfactory
TOTAL               NULL     180     Good

我会承认对枢轴的使用不是很好，因此经过几次尝试导致此输出：

SELECT 'RESULT' AS 'Ratio'
  ,[Current Ratio] AS 'Current Ratio'
  ,[Gearing Ratio] AS 'Gearing Ratio'
  ,[Performance Ratio] AS 'Performance Ratio'
  ,[TOTAL] AS 'TOTAL'
FROM
(
  SELECT RATIO, RESULT 
  FROM GRAND_TOTALS
) AS SREC
PIVOT 
(
  MAX(RESULT) 
  FOR RATIO IN ([Current Ratio],[Gearing Ratio], [Performance Ratio], [TOTAL])
) AS PVT

结果如下：

Ratio    Current Ratio   Gearing Ratio   Performance Ratio
Result   1.294           0.3384          0.0427

我承认在下一步该怎么做才能产生所需的结果时感到很沮丧：

Ratio    Current Ratio   Gearing Ratio   Performance Ratio   TOTAL
Result   1.294           0.3384          0.0427              NULL
Score    60              70              50                  180
Grade    Good            Good            Satisfactory        Good

Answer 1

由于您想透视数据的多列，因此我首先建议不要透视result ， score和grade列，这样就不会有多列，但会有多行。

根据您的SQL Server版本，您可以使用UNPIVOT函数或CROSS APPLY。 取消数据透视的语法类似于：

select ratio, col, value
from GRAND_TOTALS
cross apply
(
  select 'result', cast(result as varchar(10)) union all
  select 'score', cast(score as varchar(10)) union all
  select 'grade', grade
) c(col, value)

请参阅带有演示的SQL Fiddle 。 一旦数据被取消透视，就可以应用PIVOT功能：

select ratio = col,
  [current ratio], [gearing ratio], [performance ratio], total
from
(
  select ratio, col, value
  from GRAND_TOTALS
  cross apply
  (
    select 'result', cast(result as varchar(10)) union all
    select 'score', cast(score as varchar(10)) union all
    select 'grade', grade
  ) c(col, value)
) d
pivot
(
  max(value)
  for ratio in ([current ratio], [gearing ratio], [performance ratio], total)
) piv;

请参阅带有演示的SQL Fiddle 。 这将为您提供结果：

|  RATIO | CURRENT RATIO | GEARING RATIO | PERFORMANCE RATIO |     TOTAL |
|--------|---------------|---------------|-------------------|-----------|
|  grade |          Good |          Good |      Satisfactory |      Good |
| result |       1.29400 |       0.33840 |           0.04270 |    (null) |
|  score |      60.00000 |      70.00000 |          50.00000 | 180.00000 |