Question

我试图从表中获取一个列表订单中的列Email_Id用户包含重复项（具有重复电子邮件的用户中的行）。

SELECT
    o.[Email], o.[Email_Id], d.intCount
FROM (
     SELECT [Email], COUNT(*) as intCount
     FROM [Server].[dbo].[Table]
     GROUP BY [Email]
     HAVING COUNT(*) > 1
) AS d
    INNER JOIN [Server].[dbo].[Table] o ON o.[Email] = d.[Email]

所以我尝试了以下内容：

SELECT * FROM [Server].[dbo].[Orders]
WHERE [Email_Id] IN/
    SELECT
        o.[Email], o.[Email_Id], d.intCount
    FROM (
         SELECT [Email], COUNT(*) as intCount
         FROM [Server].[dbo].[Users]
         GROUP BY [Email]
         HAVING COUNT(*) > 1
    ) AS d
        INNER JOIN [Server].[dbo].[Users] o ON o.[Email] = d.[Email]
)

返回当未使用EXISTS引入子查询时，只能在选择列表中指定一个表达式。

还试过：

SELECT [Order_Is], (
SELECT
        o.[Email], o.[Email_Id], d.intCount
    FROM (
         SELECT [Email], COUNT(*) as intCount
         FROM [Server].[dbo].[Users]
         GROUP BY [Email]
         HAVING COUNT(*) > 1
    ) AS d
        INNER JOIN [Server].[dbo].[Users] o ON o.[Email] = d.[Email]
    )
as [Email_Id]
FROM [Server].[dbo].[Orders]

结果相同。

知道我做错了什么？

谢谢！

Answer 1

SELECT * 
FROM [Server].[dbo].[Orders]
JOIN ( SELECT [Email], [Email_Id], 
               count(*) over (partition by [Email]) as cnt
         FROM [Server].[dbo].[Users] ) tt
  on tt.[Email_Id] = [Orders].[Email_Id] 
 and tt.[cnt] > 1

Answer 2

在WHERE语句子查询中，IN运算符只能有一个字段或表达式，这就是错误所说的，请尝试这种方式：

SELECT * FROM [Server].[dbo].[Orders]
WHERE [Email_Id] IN (
    SELECT
        o.[Email_Id]
    FROM (
         SELECT [Email], COUNT(*) as intCount
         FROM [Server].[dbo].[Users]
         GROUP BY [Email]
         HAVING COUNT(*) > 1
    ) AS d
        INNER JOIN [Server].[dbo].[Users] o ON o.[Email] = d.[Email]
)

从重复列表中搜索另一个表中的ID

2 个答案: