如何返回以列名作为第一行的 T-SQL 查询

我正在编写一个 SSIS 包来将数据从 SQL Server 2012 数据库输出到.CSV为客户归档。要求是第一行是列名称。下面是我为数据流任务中的源编写的查询。问题是，它总是将列名返回为最后一行，而不是第一行。为什么？我该如何实现这一目标？

DECLARE @Today AS DateTime= GETDATE()
DECLARE @NextPayrollDate AS DateTime

EXEC mobile.getNextPayrollDate @Today, @NextPayrollDate OUTPUT

;WITH LatestEligible (EmployeeID, LatestBillVerified) AS
(
    SELECT 
        EmployeeID, MAX(DateBillVerified) AS LatestBillVerified
    FROM 
        Inv_DataReimbursement
    GROUP BY 
        EmployeeID
)
SELECT
    'Edit Set' AS 'Edit Set', 
    'Employee No.' AS 'Employee No.'
FROM 
    LatestEligible

UNION

SELECT 
    NULL AS 'Edit Set',
    d.EmployeeID AS 'Employee No.'
FROM 
    LatestEligible d
INNER JOIN 
    Employee e ON d.EmployeeID = e.EmployeeID
INNER JOIN 
    Inv_DataReimbursement dr ON d.EmployeeID = dr.EmployeeID 
                             AND d.LatestBillVerified = dr.DateBillVerified
WHERE 
    (dr.MonthlyServiceEligible = 'true'
     OR (dr.MonthlyServiceEligible = 'false' 
         AND e.DateEnd IS NOT NULL 
         AND e.DateEnd > @NextPayrollDate))
    AND dr.ActualAmount > 0

我该如何实现这一目标？

不要通过 SQL 来完成。

只需勾选第一个数据行中的列名称框中的平面文件连接管理器 https://learn.microsoft.com/en-us/sql/integration-services/connection-manager/flat-file-connection-manager?view=sql-server-2017并保持原始查询不变。

然后，列标题将自动添加，而无需合并这些附加元数据（并且可能在 SQL 端将所有内容转换为字符串）。