如何将动态SQL Server数据透视表导出到Excel

Question

I'm working on a webapp that displays data from a Microsoft SQL Server dynamic pivot table.

Normally I'd try and figure out a way to do the dynamic pivot in c#, but in this case the pivot has to be a SQL Server stored procedure because other apps also need access to the pivot table.

Here's the SQL:

DECLARE @DynamicPivot AS NVARCHAR(MAX)
DECLARE @ColumnName AS NVARCHAR(MAX)

SELECT 
    @ColumnName = ISNULL(@ColumnName + ',', '') 
                  + QUOTENAME(xml_tag_name)
FROM 
    (SELECT DISTINCT xml_tag_name FROM DataEntries) AS TagValues

SET @DynamicPivot =
N'SELECT DISTINCT capture_id, ' + @ColumnName + '
FROM DataEntries
PIVOT(MAX(xml_tag_value) 
FOR xml_tag_name IN (' + @ColumnName + ')) AS PVTTable'

EXEC sp_executesql @DynamicPivot

All the articles I've gone through deal with normal export to Excel or static pivots. eg: Export Table from SQL Server to Excel 2007 using C# .

How do I go about exporting this dynamic pivot to Excel?

Answer 1

heres a example for you.

It creates dynamic pivot to global temp table and then exports it to excel. If you find problems with export part - let me know.

CREATE TABLE Table1 (ColId INT,ColName VARCHAR(10))
INSERT INTO Table1 VALUES(1, 'Country')
INSERT INTO Table1 VALUES(2, 'Month')
INSERT INTO Table1 VALUES(3, 'Day')

CREATE TABLE Table2 (tID INT,ColID INT,Txt VARCHAR(10))

INSERT INTO Table2 VALUES (1,1, 'US')
INSERT INTO Table2 VALUES (1,2, 'July')
INSERT INTO Table2 VALUES (1,3, '4')
INSERT INTO Table2 VALUES (2,1, 'US')
INSERT INTO Table2 VALUES (2,2, 'Sep')
INSERT INTO Table2 VALUES (2,3, '11')
INSERT INTO Table2 VALUES (3,1, 'US')
INSERT INTO Table2 VALUES (3,2, 'Dec')
INSERT INTO Table2 VALUES (3,3, '25')


DECLARE @cols NVARCHAR(2000);
SELECT  @cols = COALESCE(@cols + ',[' + colName + ']', '[' + colName + ']')
FROM    Table1
ORDER BY colName;
IF OBJECT_ID('tempdb..##t1') IS NOT NULL
    BEGIN
        DROP TABLE ##t1;
    END;

DECLARE @query NVARCHAR(4000);
SET @query = N'SELECT tID, ' + @cols + ' into ##t1
FROM
(SELECT  t2.tID
      , t1.ColName
      , t2.Txt
FROM    Table1 AS t1
        JOIN Table2 AS t2 ON t1.ColId = t2.ColID) p
PIVOT
(
MAX([Txt])
FOR ColName IN
( ' + @cols + ' )
) AS pvt
ORDER BY tID;';


EXECUTE(@query);

SELECT  *
FROM    ##t1;


DECLARE @sql VARCHAR(MAX);
DECLARE @FileName VARCHAR(MAX) = 'C:\Test.xls';
SET @sql = 'INSERT INTO OPENROWSET(''Microsoft.ACE.OLEDB.12.0'',''Excel 12.0;Database='
    + @FileName + ''',''SELECT * FROM [Sheet1$]'') SELECT * FROM ##T1';
EXECUTE(@sql);