Question

我在access中写了一个查询，但是我不知道它是否正常（它可以工作），而且正如我的c ++程序员朋友所说的那样，“它先工作就可以了”，但是我对sql还是陌生的，我想改进它，而不是把东西砸下来。

我的代码包括将列中的行转换为列，并根据折扣标准检索每种产品的折扣总额。

TRANSFORM sum(c.[min value# %]) AS sum_min_value
SELECT c.supplier, c.sku, c.dept, c.UN, a.BRAND, sum(c.[min value# %]) AS 
Total_of_discount
FROM (SELECT a.*, d.* FROM price AS a LEFT JOIN (SELECT * FROM CGF AS b 
   WHERE (b.variable="cmp" and b.order="1"))  AS d ON IIf(d.brand="-",(Not 
   ((d.[structure exclusion]=cstr(a.dept)) Or (d.[structure 
   exclusion]=cstr(a.un)))) And (d.structure=a.dept Or d.structure=a.un Or 
   d.structure=25) And (a.supplier=d.[# supplier]),(Not ((d.[structure 
   exclusion]=cstr(a.dept)) Or (d.[structure exclusion]=cstr(a.un)))) And 
   (d.structure=a.dept Or d.structure=a.un Or d.structure=25) And 
   (a.supplier=d.[# supplier]) And (d.brand=a.brand) And Not (d.[brand 
   exclusion]=a.brand)))  AS c
GROUP BY c.supplier, c.sku, c.dept, c.un, a.BRAND
PIVOT c.[HEADING CGF];

我更怀疑的部分是if语句。你能帮忙吗ty

Answer 1

我看不到“ ON”如何工作。请在此查询中发布示例输出行。

我希望看到“ a.somecolumn1 = d.somecolumn2）。

但是我看到的是IIF x，然后是一对类似的逻辑子句。将使用两个备选的join语句？

TRANSFORM SUM(c.[min value# %]) AS sum_min_value
SELECT c.supplier,
       c.sku,
       c.dept,
       c.un,
       a.brand,
       SUM(c.[min value# %]) AS Total_of_discount
FROM   (SELECT a.*,
               d.*
        FROM      price AS a
        LEFT JOIN (SELECT *
                   FROM   cgf AS b
                   WHERE  ( b.variable = "cmp" AND b.ORDER = "1" )
                  ) AS d

        ON Iif(d.brand = "-", ( NOT ( ( d.[structure exclusion] = Cstr(a.dept) )
                                    OR( d.[structure exclusion] = Cstr(a.un) ) ) )
                                  AND ( d.structure = a.dept
                                     OR d.structure = a.un
                                     OR d.structure = 25 )

                                  AND ( a.supplier = d.[# supplier] )
                            ,

                              ( NOT ( ( d.[structure exclusion] = Cstr(a.dept) )
                                   OR ( d.[structure exclusion] = Cstr(a.un) ) ) )
                                  AND ( d.structure = a.dept
                                     OR d.structure = a.un
                                     OR d.structure = 25 )

                                  AND ( a.supplier = d.[# supplier] )

                                  AND ( d.brand = a.brand )
                              AND NOT ( d.[brand exclusion] = a.brand ))
        ) AS c

GROUP  BY c.supplier,
          c.sku,
          c.dept,
          c.un,
          a.brand
PIVOT c.[HEADING CGF];

改善访问查询

1 个答案: