如何在子查询中使用 COUNT()

Question

我的查询为您提供了在日期“2014-06-01”和“2014-12-31”之间有销售额 Header 或有销售发票的客户。

现在我想创建两个新列，显示日期“2014-06-01”和“2014-12-31”之间的销售发票数量以及每个客户获得的销售额 header。

这里的问题是我真的不明白怎么想，我得到这个错误

Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

这是我的 SQL 查询。

SELECT t1.Name, /*THIS PART GIVES ME THE ERROR*/ (SELECT COUNT(t5.[Bill-to Customer No_]) as he
                FROM [dbo].[MNO International AB$Sales Header] t5
                WHERE EXISTS
                            (SELECT * FROM [dbo].[MNO International AB$Customer] t6 
                                WHERE t5.[Bill-to Customer No_]=t6.[No_])
                GROUP BY t5.[Bill-to Name]
                ) as TempSa


FROM [dbo].[MNO International AB$Customer] t1
WHERE (EXISTS
         (SELECT *
          FROM [dbo].[MNO International AB$Sales Header] t2
          WHERE t2.[Bill-to Customer No_] =t1.[No_])
       OR EXISTS
         (SELECT *
          FROM [dbo].[MNO International AB$Sales Invoice Header] t3
          WHERE t3.[Posting Date] BETWEEN '2014-06-01' AND '2014-12-31' AND t3.[Bill-to Customer No_] = t1.No_))

这两个查询为我提供了每个客户正确的销售额 header 和每个客户日期之间的发票。如何将这两个查询合并到上面查询中的 select 语句？

    SELECT t1.[Bill-to Name], COUNT(t1.[Bill-to Customer No_]) as Temp
FROM [dbo].[MNO International AB$Sales Header] t1
WHERE EXISTS
            (SELECT * FROM [dbo].[MNO International AB$Customer] t2 
                WHERE t1.[Bill-to Customer No_]=t2.[No_] )
GROUP BY t1.[Bill-to Name]

.

SELECT t1.[Bill-to Name], COUNT(t1.[Bill-to Customer No_]) as Temp
FROM [dbo].[MNO International AB$Sales Invoice Header] t1
WHERE EXISTS
            (SELECT * FROM [dbo].[MNO International AB$Customer] t2 
                WHERE t1.[Bill-to Customer No_]=t2.[No_] AND t1.[Posting Date] BETWEEN '2014-06-01' AND '2014-12-31' AND t2.[No_]='101716' )
GROUP BY t1.[Bill-to Name]

Answer 1

您在子查询中有一个 GROUP BY。我不确定您是否只需要删除它或用相关子句替换它，但这将修复语法错误：

SELECT t1.Name, 
       (SELECT COUNT(t5.[Bill-to Customer No_]) as he
        FROM [dbo].[MNO International AB$Sales Header] t5
        WHERE EXISTS (SELECT 1
                      FROM [dbo].[MNO International AB$Customer] t6 
                      WHERE t5.[Bill-to Customer No_] = t6.[No_]
                     ) 
      ) as TempSa

不过，我认为你想要的值是：

SELECT t1.Name, 
       (SELECT COUNT(t5.[Bill-to Customer No_]) as he
        FROM [dbo].[MNO International AB$Sales Header] t5
        WHERE EXISTS (SELECT 1
                      FROM [dbo].[MNO International AB$Customer] t6 
                      WHERE t5.[Bill-to Customer No_] = t6.[No_]
                     ) AND
              t5.[Bill-to Name] = t1.Name
--------------^ correlation clause instead of `GROUP BY`
      ) as TempSa

如何在子查询中使用 COUNT()

How to use COUNT() in subquery

sql-server

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subquery