dynamic crosstab/pivot tables

Dynamic Cross-Tabs/Pivot Tables - SQLTeam.com
... a feature of MS Access is the TRANSFORM statement, used to create cross-tabs/pivot tables. It does all of the work of dynamically generating the cross-tabulation and the summary calculations. T-SQL unfortunately doesn't have this statement, so you're stuck using complicated SQL commands, expensive 3rd party products, or exotic OLAP to make pivot tables    ...or you can use the following procedure to dynamically create them!

CREATE PROCEDURE sp_crosstab
   @select varchar(8000),
   @sumfunc varchar(100),
   @pivot varchar(100),
   @table varchar(100) AS
DECLARE @sql varchar(8000), @delim varchar(1)
SET NOCOUNT ON
SET ANSI_WARNINGS OFF
EXEC ('SELECT ' + @pivot + ' AS pivot INTO ##pivot FROM ' + @table + ' WHERE 1=2')
EXEC ('INSERT INTO ##pivot SELECT DISTINCT ' + @pivot + ' FROM ' + @table + ' WHERE ' + @pivot + ' Is Not Null')
SELECT @sql='', @sumfunc=stuff(@sumfunc, len(@sumfunc), 1, ' END)' )
SELECT @delim=CASE Sign( CharIndex('char', data_type)+CharIndex('date', data_type) )
WHEN 0 THEN '' ELSE '''' END
FROM tempdb.information_schema.columns
WHERE table_name='##pivot' AND column_name='pivot'
SELECT @sql=@sql + '''' + convert(varchar(100), pivot) + ''' = ' +
stuff(@sumfunc,charindex( '(', @sumfunc )+1, 0, ' CASE ' + @pivot + ' WHEN '
+ @delim + convert(varchar(100), pivot) + @delim + ' THEN ' ) + ', ' FROM ##pivot
DROP TABLE ##pivot
SELECT @sql=left(@sql, len(@sql)-1)
SELECT @select=stuff(@select, charindex(' FROM ', @select)+1, 0, ', ' + @sql + ' ')
EXEC (@select)
SET ANSI_WARNINGS ON

usage:

EXECUTE sp_crosstab SELECT statement, summary calculation, pivot column, table name

examples:

pubs database:

EXECUTE sp_crosstab 'select title from titles inner join sales on (sales.title_id=titles.title_id)
group by title', 'sum(qty)','stor_id','stores'

EXECUTE sp_crosstab 'select pub_name, count(qty) as orders, sum(qty) as total 
from sales inner join titles on (sales.title_id=titles.title_id) 
right join publishers on (publishers.pub_id=titles.pub_id) 
group by pub_name', 'sum(qty)','type','titles'

Northwind database:

EXECUTE sp_crosstab 'SELECT LastName FROM Employees INNER JOIN Orders 
ON (Employees.EmployeeID=Orders.EmployeeID) 
GROUP BY LastName', 'count(lastname)', 'Year(OrderDate)', 'Orders'

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