consulta

[Libras]

http://www.artfulsoftware.com/infotree/qrytip.php?id=78

el ejemplo desglozado por si te da pereza leer:

Código MySQL:

DROP TABLE IF EXISTS sales; 
CREATE TABLE Sales (empID INT, yr SMALLINT, sales DECIMAL(10,2)); 
INSERT sales VALUES 
(1, 2005, 12000),(1, 2006, 18000),(1, 2007, 25000), 
(2, 2005, 15000),(2, 2006, 6000),(3, 2006, 20000),(3, 2007, 24000); 
 
 
SELECT  
  IFNULL(empId,'Totals') AS EmpId,       -- outer query labels rollup row 
  sums.2005, sums.2006, sums.2007,       -- and calculates horizontal sums 
  sums.2005 + sums.2006 + sums.2007 AS Sums 
FROM (                                   -- inner query groups by employee 
  SELECT                                 -- with an expression for each column 
    EmpID, 
    SUM(IF(Yr=2005,sales,0)) As '2005', 
    SUM(IF(Yr=2006,sales,0)) As '2006', 
    SUM(IF(Yr=2007,sales,0)) As '2007' 
  FROM Sales 
  GROUP BY EmpID WITH ROLLUP 
) AS sums; 
+--------+----------+----------+----------+-----------+ 
| EmpId  | 2005     | 2006     | 2007     | Sums      | 
+--------+----------+----------+----------+-----------+ 
| 1      | 12000.00 | 18000.00 | 25000.00 |  55000.00 | 
| 2      | 15000.00 |  6000.00 |     0.00 |  21000.00 | 
| 3      |     0.00 | 20000.00 | 24000.00 |  44000.00 | 
| Totals | 27000.00 | 44000.00 | 49000.00 | 120000.00 | 
+--------+----------+----------+----------+-----------+
 

Lo que se busca en ese ejemplo es sacar las ventas de cada año, aqui tendrias que acomodarlo a tus necesidades, en lugar de sum por year sum por precio y cantidad