mysql的项目销售

Question

我想在这里提出一个问题......让我解释一下... 这里我有3个表， 1. transaction_table 2. transaction_detail 3项

不，我这里的问题是我想知道的项目本月销售（2013-01）中的示例中，这里是我的表结构...

1交易表

-------------------------- 
idTransaction | date  | idUser | idCustomer | total | NOSC 
-------------------------------------------------------------------- 
1    | 2013-01-01 | 3  | 4   | 500000 | 1CO 
2    | 2013-01-01 | 3  | 5   | 450000 | 2CO 
3    | 2013-01-01 | 3  | 6   | 250000 | 3CO 

2 transaction_detail

----------------------------------------------------------------- 
idTransaction | idItem | qty | price 
---------------------------------------- 
1    | 1  | 2 | 250000 
2    | 2  | 1 | 250000 
2    | 3  | 1 | 200000 
3    | 1  | 1 | 250000 

3项表

idItem | Name Item 
--------------------------------------- 
1  | glass 
2  | Medicine A 
3  | Medicine B 

4客户

idCustomer | Name Customer 
    -------------------------------------- 
    4    | Abuh 
    5    | Abeh 
    6    | ABooh 

因此，基于这些表我想获得这样的数据....

Name Item | Nosc | Customer | Sold Quantity | @ Price | Total 
--------------------------------------------- 
Glass  | 1CO | Abuh  |2    | 250000 | 500000 
Glass  | 3CO | ABooh |1    | 250000 | 250000 
Medicine A| 2CO | Abeh  |1    | 250000 | 250000 
Medicine B| 2CO | Abeh  |1    | 200000 | 200000 

任何人都可以帮助我？

Answer 1

SELECT b.`name Item`, 
     a.qty `Sold Quantity`, 
     a.price `@ price`, 
     (a.qty * a.price) Total 
FROM transaction_detail a  
     INNER JOIN Item b 
      ON a.idItem = b.idItem 

• SQLFiddle Demo

上述查询基于所述记录并在该示例的结果给出。 后续问题：有没有可能以某种不同的价格销售某种商品？如果是这样，你如何计算它？

UPDATE 1

SELECT b.`name Item`, 
     SUM(a.qty) `Sold Quantity`, 
     a.price `@ price`, 
     (SUM(a.qty) * a.price) Total, 
     c.Date 
FROM transaction_detail a  
     INNER JOIN Item b 
      ON a.idItem = b.idItem 
     INNER JOIN `transaction` c 
      ON a.idtransaction = c.idTransaction 
GROUP BY b.idItem, b.`name Item`, a.price, c.Date 

• SQLFiddle Demo

UPDATE 2

SELECT b.`name Item`, 
     SUM(a.qty) `Sold Quantity`, 
     a.price `@ price`, 
     (SUM(a.qty) * a.price) Total, 
     d.`Name Customer` 
FROM transaction_detail a  
     INNER JOIN Item b 
      ON a.idItem = b.idItem 
     INNER JOIN `transaction` c 
      ON a.idtransaction = c.idTransaction 
     INNER JOIN Customer d 
      ON d.idCustomer = c.idCustomer 
GROUP BY b.idItem, b.`name Item`, a.price, 
      MONTH(c.Date), YEAR(c.Date), d.`Name Customer` 

• SQLFiddle Demo

Answer 2

select it.item_name,td.qty,td.price,t.total 
    from transaction as t,transaction_detail as td,item_table as it 
    where t.idTransaction=td.idTransaction 
    and td.idItem=it.idItem 
    and t.date between 'YEAR(CURDATE())."-".MONTH(CURDATE())."-"."01"' 
        and 'YEAR(CURDATE())."-".MONTH(CURDATE())."-"."31"'