[英]How can I get the price to depend on id using MySQL
我将price
和quantity
的总和相乘得到总数。 当我从不同的表中将两列相乘时出现的问题是我得到了错误的结果。 价格与第一行10
的sup_med_id
不匹配。 如何获得价格取决于sup_med_id
?
sup_med_id price sup_id rec_order_dtls sup_med_id rec_quantity
1 10.00 2 1 1 200
2 12.00 2 2 2 100
date_id date
1 2019-01-01
2 2019-01-02
... ...
输出量
Month Quantity Total Supplier
...
Jul 0 0 NULL
Aug 300 3000 Unilever
我没有将所有数据和表格放在上面。 我希望这是下面的结果。
预期产量
Month Quantity Total Supplier
...
Jul 0 0 NULL
Aug 300 3200 Unilever
SELECT DATE_FORMAT(tbl_date.date, '%b')
AS Month,
COUNT(tbl_purchase_received_details.purchase_received_id)
AS Total_Order,
SUM(IFNULL(tbl_purchase_received_details.received_quantity,0))
AS Quantity,
IFNULL((tbl_supplier_medicine.price) *
SUM(tbl_purchase_received_details.received_quantity),0)
AS Total_Amount,
tbl_supplier.supplier_name
AS Supplier FROM tbl_date
LEFT JOIN
tbl_purchase_received ON tbl_purchase_received.date_received = tbl_date.date
LEFT JOIN
tbl_purchase_received_details ON tbl_purchase_received.purchase_received_id
= tbl_purchase_received_details.purchase_received_id
LEFT JOIN
tbl_supplier_medicine ON tbl_supplier_medicine.supplier_medicine_id =
tbl_purchase_received_details.supplier_medicine_id
LEFT JOIN tbl_supplier ON tbl_supplier.supplier_id =
tbl_supplier_medicine.supplier_id
WHERE YEAR(tbl_date.date) = YEAR(NOW())
GROUP BY DATE_FORMAT(tbl_date.date, '%b')
ORDER BY tbl_date.date
您好如果我正确理解您的问题,那么您需要将数量和价格相乘才能得出总数。 如果正确,则可以使用以下查询:
select tt.rec_quantity as quantity, (price * rec_quantity) as total from temp t inner join temp2 tt on t.sup_med_id=tt.sup_med_id;
如果其中一个表中没有匹配数据,则可以使用左连接 。 让我知道您是否需要帮助。
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