选择具有相同EmailAddress列的ID

Question

我需要：

我正在寻找一种解决方案，可以为我提供所有具有相同EmailAddress列的员工ID（过滤器必须通过EmailAddress进行）我想知道与重复的电子邮件地址对应的ID是什么，然后检索该信息

表员工

Id |编号|邮箱地址| EmployeeBeginingDate | EmployedEndDate |名称UserId（FK）|创建dBy | CreatedOn

SELECT Employee.Id,Employee.EmailAddress
FROM Employee a
INNER JOIN (SELECT 
                Employee.Id as EmployeeId,
                Employee.EmailAddress as EmailAddress,                
            FROM Employee
            GROUP BY Employee.Id,Employee.EmailAddress
            HAVING count(Employee.EmailAddress) > 1
                ) b
ON a.Id= b.EmployeeId  
ORDER BY a.Id

我总是收到错误类型“无法绑定多部分标识符”，我想我知道为什么，但是我想我无法解决此问题

Answer 1

请尝试以下查询，因为别名表Employee为a。因此，您必须使用a来代替Employee。

SELECT a.Id, a.EmailAddress
FROM Employee a
INNER JOIN (SELECT 
                Employee.Id as EmployeeId,
                Employee.EmailAddress as EmailAddress,                
            FROM Employee
            GROUP BY Employee.Id,Employee.EmailAddress
            HAVING count(Employee.EmailAddress) > 1
                ) b
ON a.Id = b.EmployeeId  
ORDER BY a.Id