Question

目前我有一张由价格组成的表格。

列PriceList，ItemCode，DiscountLine，Amount，Price。

E.G。

*1   , ITEM1 , 0 , 100 , 0.50  
*1   , ITEM1 , 1 , 200 , 0.45  
1234 , ITEM1 , 0 , 100 , 0.45  
1234 , ITEM1 , 1 , 100 , 0.40

问题是，PriceList可以是价格表（以*开头）或客户编号。

我需要一行结果;

所以

CUSTOMER    ITEM    AMOUNT0   PRICE0    AMOUNT1    PRICE1
1234        ITEM1   100       0.45      200        0.40

为此我使用以下代码：

select Customer.CardCode ,Customer.CardName,SP.* from Customer inner join (
select  ItemCode,CardCode,
   max(case when DPNum=0 then Amount end) Amount1,
   max(case when DPNum=0 then Price end) Price1,
   max(case when DPNum=1 then Amount end) Amount2,
   max(case when DPNum=1 then Price end) Price2,
   max(case when DPNum=2 then Amount end) Amount3,
   max(case when DPNum=2 then Price end) Price3,
   max(case when DPNum=3 then Amount end) Amount4,
   max(case when DPNum=3 then Price end) Price4,
   max(case when DPNum=4 then Amount end) Amount5,
   max(case when DPNum=4 then Price end) Price5,
   max(case when DPNum=5 then Amount end) Amount6,
   max(case when DPNum=5 then Price end) Price6,
   max(case when DPNum=6 then Amount end) Amount7,
   max(case when DPNum=6 then Price end) Price7,
   max(case when DPNum=7 then Amount end) Amount8,
   max(case when DPNum=7 then Price end) Price8,
   max(case when DPNum=8 then Amount end) Amount9,
   max(case when DPNum=8 then Price end) Price9,
   max(case when DPNum=9 then Amount end) Amount10,
   max(case when DPNum=9 then Price end) Price10
 from SPP2 group by ItemCode,CardCode 
 ) sp
 on sp.CardCode = Customer.CardCode or sp.CardCode = '*'+cast(ListNum as varchar(1))
 where Customer.Cardcode='1234'
 order by Customer.CardCode,ItemCode,sp.CardCode DESC

这对于一个小细节来说是分开的; 如果客户有价格表（并且所有客户都有）并且他们有“特殊”价格;我得到每件2行。

所以我的结果是：

CUSTOMER    NAME    ITEM    PLCODE   AMOUNT0   PRICE0    AMOUNT1    PRICE1
1234        DUMMY   ITEM1   1234     100       0.45      200        0.40
1234        DUMMY   ITEM1   *1       100       0.50      200        0.45

如果客户有特价，则只返回此价格。有没有办法在一个查询中完成此操作？（或者可能有更有效的方式来做我想要完成的事情）？

Answer 1

您可以使用row_number()为每位客户获取一行。这是一个想法：

select csp.*
from (select c.*, sp.*,
             row_number() over (partition by customer
                                order by (case when plcode like '*_' then 1 else 2 end)
                               ) as seqnum
      from customer c join
           (select ItemCode, CardCode,
                   max(case when DPNum=0 then Amount end) Amount1,
                   max(case when DPNum=0 then Price end) Price1,
                   . . .
            from SPP2
            group by ItemCode, CardCode 
           ) sp
           on sp.CardCode = Customer.CardCode or sp.CardCode = '*'+cast(ListNum as varchar(1))
      where c.Cardcode = '1234'
     ) csp
where seqnum = 1;

SQL创建定价表

1 个答案: