查詢自營店已經上架的商品3月份銷售數據

select shop.vendor_code as '供應商編碼', shop.shop_name as '供應商名稱', item.bn as '產品編碼', cat.cat_name as '產品類別', item.title as '產品名稱', order_tmp.num as '銷售數量', item.cost_

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