SQL语句，统计子查询的总和。

Question

SELECT price=(select sum(price*ScanLog_M.qty) from Storage_In_Product_M where storage_in_id=ScanLog_M.storage_in_id and product_id=ScanLog_M.product_id)
FROM ScanLog_M
怎么统计price的总和?

Answer 1

直接晕掉。。。。。兄弟，好好学学sql哈
突然发现你们都不喜欢用别名
用别名sql多简洁啊
SELECT SUM(A.PRICE*B.QTY) as PRICE
FROM STORAGE_IN_PRODUCT_M A ,
SCANLOG_M B
WHERE A.STORAGE_IN_ID = B.STORAGE_IN_ID
AND A.PRODUCT_ID = B.PRODUCT_ID。

Answer 2

把price=修改为sum就可以了
SELECT sum (select sum(price*ScanLog_M.qty) from Storage_In_Product_M where storage_in_id=ScanLog_M.storage_in_id and product_id=ScanLog_M.product_id)
FROM ScanLog_M

Answer 3

SELECT SUM(STORAGE_IN_PRODUCT_M.PRICE*SCANLOG_M.QTY) as PRICE
FROM STORAGE_IN_PRODUCT_M,SCANLOG_M
WHERE STORAGE_IN_PRODUCT_M.STORAGE_IN_ID = SCANLOG_M.STORAGE_IN_ID
AND STORAGE_IN_PRODUCT_M.PRODUCT_ID = SCANLOG_M.PRODUCT_ID

不过你这样合计 是把全表的数据都合计在一起了！~ 应该有一个分组的字段吧？

Answer 4

sum()，你SQL有问题