Database error: Invalid SQL: SELECT count(*) as num_rows FROM product,
product_category_xref, category WHERE product_parent_id=''AND product.product_id=product_category_xref.product_id AND category.category_id=product_category_xref.category_id AND product.product_publish='Y' AND product.product_id=product_price.product_price ORDER BY product_price.product_price MySQL Error: 1054 (Unknown column 'product_price.product_price' in 'where clause')