如何在Crystal Reports for Visual Studio中使用动态列来实现透视报表？

Question

I have a stored procedure (SQL), it is make with a pivot query with dynamic columns . Some querys generate 2 or more columns, it all depends by the parameter. How do I achieve a report in Crystal Reports for Visual Studio (C# or VB) with this dynamic columns pivot?

Answer 1

This can be done. Here is an example below.

DECLARE @ColumnString varchar(200), 
    @sql varchar(1000)


CREATE TABLE #ColumnValue
(
  Value varchar(500)
)

INSERT INTO #ColumnValue (Value)
SELECT DISTINCT '[' + 'value' + Convert(Varchar(20),ROW_NUMBER() Over(Partition by id Order by id )) + ']'
FROM Test

SELECT @ColumnString = COALESCE(@ColumnString + ',', '') + Value
FROM #ColumnValue
Drop table #ColumnValue



SET @sql =
'
SELECT *
FROM
(
SELECT
        id,name,val,''value'' + Convert(Varchar(20),ROW_NUMBER() Over(Partition by id Order by id ))as [values]
FROM Test
) AS P
    PIVOT
(
    MAX(val) FOR [values] IN ('+@ColumnString+')
) AS pv
'

--print @sql 
EXEC (@sql)

Answer 2

I could resolve this, and this is how I did it for future similar problems:

• First. My stored procedure makes a query with a pivot with dynamic columns. I had to remove the pivot from my query, so only select the 3 same columns with a lot of rows.

The results (without pivot) is like this:

ClaveLMG Calificacion   Resultado
i7p-TP2 P1_1Excelente   100.0
i7p-TP2 P1_2Bueno       0.0
i7p-TP2 P1_3Regular     0.0
i7p-TP2 P1_4Malo        0.0
78-BD1  P1_1Excelente   100.0
78-BD1  P1_2Bueno       0.0
78-BD1  P1_3Regular     0.0
78-BD1  P1_4Malo        0.0
41-TP2  P1_1Excelente   100.0
41-TP2  P1_2Bueno       0.0
41-TP2  P1_3Regular     0.0
41-TP2  P1_4Malo        0.0
42-TC2  P1_1Excelente   100.0
42-TC2  P1_2Bueno       0.0
42-TC2  P1_3Regular     0.0
42-TC2  P1_4Malo        0.0

• Doing a research from how to use Crystal Reports, when you create a report from Crystal Report, yo have to select an assistant. I select Crosstabs .

• Finally, after select my stored procedure (without pivot), in the crosstab assistant, you have to add rows , columns , and summary fields from the fields that generate my stored procedure. Almost like when you coding a pivot.

  ____________ i7p-TP2 78-BD1 41-TP2 42-TC2 P1_1Excelente 100.000000 100.000000 100.000000 100.000000 P1_2Bueno 0.000000 0.000000 0.000000 0.000000 P1_3Regular 0.000000 0.000000 0.000000 0.000000 P1_4Malo 0.000000 0.000000 0.000000 0.000000

The result from this is a beatiful report like a pivot query.