显示不同的Badge_ID

Question

这是我的查询，其中显示当前结果。

SELECT 
    Distinct CONVERT(int, Employees_1.Emp_Badge_No) AS Emp_Badge_No,
    Employees_1.Emp_LastName, Employees_1.Emp_FirstName, Employees_1.Email,
    Employees_1.NT_Name, Employees_1.Dept_key,
    Employees_1.Emp_LastName + ',' + Employees_1.Emp_FirstName AS FullName,
    dbo.department_vw.DepartmentShortName AS deptname, 
    Employees_1.active_flag
FROM data_common.dbo.employees_union_vw AS Employees_1
INNER JOIN dbo.department_vw
    ON Employees_1.Dept_key = dbo.department_vw.DepartmentKey

示例数据：

我需要帮助才能达到预期效果。我将使用现有的sql查询修改什么？ 我希望保留所有记录，即使它不是不活动的，只要不重复Emp_Badge_No。我只想删除那些重复的Emp_Badge_No。

提前致谢。

Answer 1

您可能希望使用ROW_NUMBER。根据要检索的重复条目中的哪一行修改ORDER BY子句：

WITH Cte AS(
    SELECT 
       e.Emp_Badge_No,
       e.Emp_LastName, 
       e.Emp_FirstName,
       e.Email,
       e.NT_Name, 
       e.Dept_key, 
       e.Emp_LastName + ',' + e.Emp_FirstName AS FullName,
       d.DepartmentShortName AS deptname, 
       e.active_flag,
       rn = ROW_NUMBER() OVER(PARTITION BY e.Emp_Badge_No ORDER BY e.Active)
    FROM data_common.dbo.employees_union_vw AS e
    INNER JOIN dbo.department_vw d
        ON e.Dept_key = d.DepartmentKey
)
SELECT
    Emp_Badge_No,
    Emp_LastName, 
    Emp_FirstName,
    Email,
    NT_Name, 
    Dept_key, 
    FullName,
    deptname, 
    active_flag
FROM Cte
WHERE rn = 1

如果有重复，上面的内容将获得非活动记录。如果您想要获取活动记录，请将rn替换为：

ROW_NUMBER() OVER(PARTITION BY Emp_Badge_No ORDER BY e.Active DESC)

如果您不关心它是活动还是非活动，请将rn替换为：

ROW_NUMBER() OVER(PARTITION BY Emp_Badge_No ORDER BY (SELECT NULL))