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php+mysql如何实现库存加权平均单价?急急!!!在线等。

WBOY
WBOYOriginal
2016-06-06 09:45:521463browse

mysqlphp

各位高手:
大家好!请帮忙实现用PHP+MYSQL实现库存加权平均单价。我现在需要求当月存货单价,当月存货单价=(月初库存存货的实际金额+(本月进货实际单价*本月进货数量))/(月初库存存货数量+本月进货数量).以下是三个表,一个是产品表cxh_product(id,code编码,p_name名称),一个是入库表storage(product_id,qty,price,total,stockage_date),一个是出库表
stockout(product_id,qty,stockout_date)。

请帮忙解决,急急。。。

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