订单统计

https://www.magentocommerce.com/magento-connect/delete-orders-6.html

Delete Orders

 SELECT  `item_id` ,  `product_id` ,  `sku` , COUNT( 1 ) 
FROM  `sales_flat_order_item` 
WHERE 1 
GROUP BY  `product_id` 
ORDER BY COUNT( 1 ) DESC 

SELECT * 
FROM  `sales_flat_order_item` 
WHERE  `created_at` >=  '2016-12-31 00:00:00'
LIMIT 0 , 30