Question

我创建了查询

SELECT Dt, CustomerName, ItemRelation, SaleCount, 
              DocumentNum, DocumentYear, IsPromo, CustomerType
              FROM [dbo].[promo_data]  where [CustomerType]='XY'

库存数据[IsPromo]（0-无库存，1是库存）如何仅选择CustomerType的这些obs XY 对于动作类别只有一个值1 = 1

简单的例子

[ItemRelation]  [SaleCount] IsPromo ,[DocumentNum]  [DocumentYear]
11203   8,85947691  0   138 2018
11203   9,450108704 0   138 2018
11203   12,40326767 1   138 2018
11202   8,85947691  0   137 2018
11202   9,450108704 0   137 2018
11202   12,40326767 1   137 2018
11202   25,98779894 1   137 2018
11202   63,19760196 1   137 2018

我必须选择

11203       1   138 2018

，因为

11202       137 2018

有两个

Answer 1

你似乎想要：

SELECT ItemRelation, DocumentNum, DocumentYear, IsPromo
FROM [dbo].[promo_data]
WHERE CustomerType = 'XY' AND IsPromo = 1
GROUP BY ItemRelation, DocumentNum, DocumentYear, IsPromo
HAVING COUNT(*) = 1;

编辑：

要检索所有列，请使用窗口函数：

SELECT *
FROM (SELECT pd.*,
             COUNT(*) OVER (PARTITION BY ItemRelation, DocumentNum, DocumentYear, IsPromo) as cnt
      FROM [dbo].[promo_data] pd
      WHERE CustomerType = 'XY' AND IsPromo = 1
     ) pd
WHERE cnt = 1;

Answer 2

根据Gordon的回答，如果要选择分组中未使用的其他字段，可以使用子查询进行自联接，如下所示：

SELECT pd.Dt, pd.CustomerName, pd.ItemRelation, pd.SaleCount, 
              pd.DocumentNum, pd.DocumentYear, pd.IsPromo, pd.CustomerType 
FROM [dbo].[promo_data] pd
INNER JOIN(
  SELECT ItemRelation, DocumentNum, DocumentYear, IsPromo
  FROM [dbo].[promo_data]
  WHERE CustomerType = 'XY' AND IsPromo = 1
  GROUP BY ItemRelation, DocumentNum, DocumentYear, IsPromo
  HAVING COUNT(*) = 1
) grouped
ON pd.ItemRelation = grouped.ItemRelation
AND pd.DocumentNum = grouped.DocumentNum
AND pd.DocumentYear = grouped.DocumentYear
AND pd.IsPromo = grouped.IsPromo

SQL：如何在ssms中将值排序为类别

2 个答案: