SQLITE - transposing rows into columns properly

Question

I\'ve a database containing a table for products order like this:

order_id | prod_code | prod_color | size | quantity |  
-----------------------------------         


        

Answer 1

I added an extra JOIN condition: AND o.prod_color = p.prod_color

http://sqlfiddle.com/#!5/fadad/5

SELECT
  o.order_id, o.prod_code, o.prod_color, o.size, o.quantity,
  MAX(CASE WHEN p.currency = 'EUR' THEN p.price END) AS 'EUR',
  MAX(CASE WHEN p.currency = 'USD' THEN p.price END) AS 'USD',
  MAX(CASE WHEN p.currency = 'YEN' THEN p.price END) AS 'YEN',
  MAX(CASE WHEN p.currency = 'RUB' THEN p.price END) AS 'RUB'

FROM products_order o
JOIN products_prices p
  ON o.prod_code = p.prod_code
 AND o.prod_color = p.prod_color /* this line is added */

WHERE o.order_id = '1'
GROUP BY
  o.order_id,
  o.prod_code,
  o.prod_color,
  o.size,
  o.quantity

Simplified example queries without the GROUP BY shows the difference:

http://sqlfiddle.com/#!5/fadad/13