Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
202 views
in Technique[技术] by (71.8m points)

sql - TSQL PIVOT MULTIPLE COLUMNS

I have the following table but unsure of whether it is possible to pivot this and retain all the labels.

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

I will admit to not being very good with the use of pivots, so after several attempts resulting in this output:

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

This gives the result:

Ratio    Current Ratio   Gearing Ratio   Performance Ratio
Result   1.294           0.3384          0.0427

I will admit to be feeling very stumped on what to do next to produce the result I need which is:

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
Question&Answers:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

Since you want to pivot multiple columns of data, I would first suggest unpivoting the result, score and grade columns so you don't have multiple columns but you will have multiple rows.

Depending on your version of SQL Server you can use the UNPIVOT function or CROSS APPLY. The syntax to unpivot the data will be similar to:

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)

See SQL Fiddle with Demo. Once the data has been unpivoted, then you can apply the PIVOT function:

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;

See SQL Fiddle with Demo. This will give you the result:

|  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 |

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...