Er det muligt at bruge Crosstab/Pivot Query i MySQL?

Du kan bruge denne forespørgsel -

SELECT
  supplier_id,
  MAX(IF(date = '2012-01-01', value, NULL)) AS '2012-01-01',
  MAX(IF(date = '2012-01-03', value, NULL)) AS '2012-01-03',
  MAX(IF(date = '2012-05-01', value, NULL)) AS '2012-05-01'
FROM (
  SELECT supplier_id, DATE(date) date, CONCAT(SUM(price), '(', qty, ')') value FROM supplier
    GROUP BY supplier_id, DATE(date)
    ) t
  GROUP BY supplier_id;

+-------------+------------+------------+------------+
| supplier_id | 2012-01-01 | 2012-01-03 | 2012-05-01 |
+-------------+------------+------------+------------+
|           1 | 500.00(2)  | 450.00(10) | NULL       |
|           2 | 400.00(5)  | NULL       | NULL       |
|           3 | NULL       | NULL       | 500.00(1)  |
+-------------+------------+------------+------------+

Det giver det resultat, du ønsker. Men hvis du vil gøre det dynamisk, så tag et kig på denne artikel 'Automatiser pivottabelforespørgsler' - http://www.artfulsoftware.com/infotree/queries.php#523 , eller dette link - Dynamiske pivottabeller .