select p.prodPriceId, p.prodId, p.pprId, p.buyerId, p.buyerRoleKey, p.salesmanId, p.salesmanRoleKey, p.costItemKey, p.surfaceQty, p.price, p.delFlag, p.createUser, p.createTime, p.updateUser, p.updateTime from m_prod_price p inner join m_cost_item c on p.costItemKey = c.costItemKey SELECT sum(p.price) price FROM m_prod_price p inner join m_cost_item c on p.costItemKey = c.costItemKey WHERE p.delFlag = '0' and p.prodId = #{prodId} and p.pprId = #{pprId} and p.buyerId = #{buyerId} and p.salesmanId = #{salesmanId} and (case when c.singleFlag = '0' then p.surfaceQty = #{surfaceQty} else 1 end)