Question

因此，在按年和月累计所有结果时遇到问题

所以我加入了四个表来提出我的结果

我有一个Customer表：

Cust_id , f_name ,  L_name

Products表：

Product_id, retail_price , cost_price

Orders表：

Order id, order_date,Cust_id,

Order_details表：

Order_id Product_id, Quantity,

这就是我现在的查询方式

SELECT 
    C.FNAME,C.LNAME,
    SUM (P.RETAILPRICE * OD.QUANTITY) AS "Total $ spent by Customer",
    DATENAME(yyyy,o.ORDER_DATE) AS YEAR, 
    DATENAME(MM,o.ORDER_DATE) AS MONTH
FROM
    ORDER_DETAILS OD
JOIN 
    PRODUCTS P ON OD.PRODUCT_ID = P.PRODUCT_ID
JOIN 
    ORDERS O ON O.ORDER_ID = OD.ORDER_ID
JOIN 
    CUSTOMER C ON C.CUST_ID = O.CUST_ID
GROUP BY  
    O.ORDER_DATE, C.FNAME,C.LNAME
ORDER BY 
    DATENAME(yyyy, o.ORDER_DATE), DATENAME(MM, o.ORDER_DATE)

此查询返回如下结果：

customer     sum        spend yr month
--------------------------------------
Bob Johnson    400.00   2010     jan
Kevin Cruz     123.10   2010     jan
Emily Sheily    74.12   2010     jan 
Lily Phantom   475.95   2010     jan 
Kevin Cruz     148.52   2010     jan

我希望凯文克鲁兹的订单能够加入到2010年1月的一笔款项中。

我的结果发生了。那年克鲁兹在那个月做了两个订单，但我似乎无法将它们加起来。

我该怎么做？

Answer 1

您不希望order_date中有group by。你想要一年又一个月：

SELECT C.FNAME,C.LNAME,
       SUM(P.RETAILPRICE * OD.QUANTITY) AS "Total $ spent by Customer",
       DATENAME(year, o.ORDER_DATE) AS YEAR, 
       DATENAME(month, o.ORDER_DATE) AS MONTH
FROM ORDER_DETAILS OD JOIN PRODUCTS
     P
     ON OD.PRODUCT_ID = P.PRODUCT_ID JOIN
     ORDERS O
     ON O.ORDER_ID = OD.ORDER_ID JOIN
     CUSTOMER C
     ON C.CUST_ID = O.CUST_ID
GROUP BY DATENAME(year, o.ORDER_DATE), DATENAME(month, o.ORDER_DATE), C.FNAME,C.LNAME
ORDER BY DATENAME(year, o.ORDER_DATE), 
         DATENAME(month, o.ORDER_DATE);

如何将一个月和一年的所有订单金额相加。 SQL

1 个答案: