我想计算采购订单金额和采购发票金额之间的差额。但我无法获取采购发票金额,即“pi.grand_total”,因此也无法获取“(pi.grand_total - po.grand_total)”的差额。请帮助。以下是我的查询。PO = 采购订单 PI = 采购发票
SELECT DISTINCT
po.name AS "PO #:Link/Purchase Order:120",
po.supplier AS "Supplier:Link/Supplier:120",
po.Company AS "Company:Data:120",
po.currency AS "Currency:Link/Currency:120",
po.base_grand_total AS "Grand Total:Currency:120",
po.status AS "Status:Data:120",
po.per_received AS "Per Received:Data:120",
CEILING(po.per_billed) AS "Per Billed:Data:120",
po.delivery_date AS "Delivery Date:Date:120",
pi.grand_total AS "Final PI Total:120",
(pi.grand_total - po.grand_total) AS "Amount Difference:120"
FROM
"tabPurchase Order" as po
LEFT JOIN "tabPurchase Invoice" as pi ON po.name = pi.parent
WHERE
po.per_received = 100
AND
CEILING(po.per_billed) < 100
ORDER BY po.delivery_date ASC