Dynamic Pivot table wizard SQL Server

原文 http://www.gyurcit.hu/pivot.html

Dynamic Pivot table wizard

This stored procedure generate dynamic crosstable with multiple pivot columns by 4+1 parameters.

 

 

1. P_Row_Field	Name of field that reperesent the spreadsheet's rows
2. P_Column_Field	Name of field that store the name of columns
3. P_Value	Name of field that represent the spreedsheet's value
4. P_From	Name of source table
5. P_Where	Filter expression (optional)

Values of second parameter field should not include apastrophe.  Procedure does not check paramaters (you must do that), so it may causes sql injection attack.

To source code click one of them

 

• MS-SQL
• MySQL

-- =================================================

-- Pivot Table Wizard            (c) 2009 by GyurcIT

-- http://www.gyurcit.hu   e-mail: [email protected]

-- =================================================



IF EXISTS (SELECT name FROM sysobjects

           WHERE  name = N'PivotWizard' AND type = 'P')

    DROP PROCEDURE PivotWizard

GO

-----------------------------------------------------

-----------------------------------------------------

CREATE PROCEDURE PivotWizard

   @P_Row_Field    VARCHAR(255),

   @P_Column_Field VARCHAR(255),

   @P_Value        VARCHAR(255),

   @P_From         VARCHAR(4000),

   @P_Where        VARCHAR(4000) = '1=1'

AS



  DECLARE @SQL NVARCHAR(4000)



  -- Build SQL statment that upload @Columns string 

  -- with @P_Column_Filed values

  CREATE TABLE #TEMP  (ColumnField varchar(100))

  SET @sql ='SELECT DISTINCT '+@P_Column_Field+' AS ColumnField'+

              ' FROM '+@P_From+

              ' WHERE '+@P_Where+

              ' ORDER BY '+@P_Column_Field

  INSERT INTO #TEMP

  EXEC(@sql)

  PRINT @sql



  -- Check count of columns

  DECLARE @Count_Columns int

  SELECT @Count_Columns = COUNT(*) FROM #Temp

  IF (@Count_Columns<1) OR (@Count_Columns>255)  BEGIN

      DROP TABLE #Temp

      RAISERROR('%d is invalid columns amount. Valid is 1-255',

16,1,@Count_columns)

      RETURN

  END

  -- Upload @Columns from #Temp

  DECLARE @Columns VARCHAR(8000),

          @Column_Field VARCHAR(8000)



  SET @Columns = ''

  DECLARE Column_cursor CURSOR LOCAL FOR

  SELECT CAST(ColumnField AS VARCHAR(60))

  FROM #Temp

  OPEN Column_cursor

  FETCH NEXT FROM Column_cursor

  INTO @Column_Field

  WHILE @@FETCH_STATUS = 0 BEGIN

      SET @Columns = @Columns +

        ' SUM('+

             ' CASE WHEN '+@P_Column_Field+'='''+ @Column_Field+''''+

             ' THEN '+@P_Value+

             ' ELSE 0 END'+

             ') AS ['+ @Column_Field +'], '

      FETCH NEXT FROM Column_cursor

      INTO @Column_Field

  END

  CLOSE Column_cursor

  DEALLOCATE Column_cursor

  DROP TABLE #Temp



  IF @Columns='' RETURN 1

  SET @Columns = Left(@Columns,Len(@Columns)-1)



  -- Build Pivot SQL statment

  DECLARE @Pivot_SQL VARCHAR(8000)

  SET @Pivot_SQL =              'SELECT '  +@P_Row_Field+', '+@Columns

  SET @Pivot_SQL = @Pivot_SQL +' FROM '    +@P_From

  SET @Pivot_SQL = @Pivot_SQL +' WHERE '   +@P_Where

  SET @Pivot_SQL = @Pivot_SQL +' GROUP BY '+@P_Row_Field

  SET @Pivot_SQL = @Pivot_SQL +' ORDER BY '+@P_Row_Field

  SET @Pivot_SQL = @Pivot_SQL + '#'



  IF Right(@Pivot_SQL,1)<>'#'

  BEGIN

     RAISERROR('SQL statement is too long. It must be less

                than 8000 charachter!',16,1)

     RETURN 1

  END

  SET @Pivot_SQL = Left(@Pivot_SQL,Len(@Pivot_SQL)-1)



  -- PRINT @Pivot_SQL

  EXEC(@Pivot_SQL)



  RETURN 0

GO



-- Example use Northwind database --

-- Example 1 --

exec PivotWizard 'ShipCountry',

                 'YEAR(OrderDate)*100+Month(OrderDate)',

                 '[ExtendedPrice]',

                 'dbo.Invoices',

                 'OrderDate BETWEEN ''1996/01/01'' and ''1996/12/31'''



GO



-- Example 2 --

exec PivotWizard 'ProductName',

                 'ShipCountry',

                 '[ExtendedPrice]',

                 'dbo.Invoices',

                 'OrderDate BETWEEN ''1996/01/01'' and ''1996/12/31'''

-- =================================================

-- Pivot Table Wizard MySQL (c) 2009 by GyurcIT

-- http://www.gyurcit.hu e-mail: [email protected]

-- =================================================

-- USE Database

DROP PROCEDURE IF EXISTS pivotwizard;



CREATE DEFINER = 'root'@'192.168.1.119'

PROCEDURE pivotwizard(

   IN P_Row_Field    VARCHAR(255),

   IN P_Column_Field VARCHAR(255),

   IN P_Value        VARCHAR(255),

   IN P_From         VARCHAR(4000),

   IN P_Where        VARCHAR(4000))

BEGIN

 DECLARE done INT DEFAULT 0;

 DECLARE M_Count_Columns int DEFAULT 0;

 DECLARE M_Column_Field varchar(60);

 DECLARE M_Columns VARCHAR(8000) DEFAULT '';

 DECLARE M_sqltext VARCHAR(8000);

 DECLARE M_stmt VARCHAR(8000);

 DECLARE cur1 CURSOR FOR SELECT CAST(Column_Field AS CHAR) FROM Temp;

 DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;



 DROP TABLE IF EXISTS Temp;

 SET @M_sqltext = CONCAT('CREATE TEMPORARY TABLE Temp ',

                   ' SELECT DISTINCT ',P_Column_Field, 

				' AS Column_Field',

                   ' FROM ',P_From,

                   ' WHERE ',P_Where,

                   ' ORDER BY ', P_Column_Field);



 PREPARE M_stmt FROM @M_sqltext;

 EXECUTE M_stmt;



 SELECT COUNT(*) INTO M_Count_Columns 

 FROM Temp 

 WHERE Column_Field IS NOT NULL;



 IF (M_Count_Columns > 0) THEN

    OPEN cur1;

    REPEAT

      FETCH cur1 INTO M_Column_Field;

      IF (NOT done) and (M_Column_Field IS NOT NULL) THEN

         SET M_Columns = CONCAT(M_Columns,

' SUM( CASE WHEN ',P_Column_Field,'=''',M_Column_Field,'''',

         		' THEN ',P_Value,

                  ' ELSE 0 END) AS `', M_Column_Field ,'`,');



      END IF;

    UNTIL done END REPEAT;

    SET M_Columns = Left(M_Columns,Length(M_Columns)-1);

    SET @M_sqltext = CONCAT('SELECT ',P_Row_Field,',',M_Columns,

                            ' FROM ', P_From,

                            ' WHERE ', P_Where,

                            ' GROUP BY ', P_Row_Field,

                            ' ORDER BY ', P_Row_Field);



    PREPARE M_stmt FROM @M_sqltext;

    EXECUTE M_stmt;

  END IF;

END

-- Example:

CALL pivotwizard('article','Month(date)',

'netto',

'invoice',

'(year(date)=2009)')