找出Sql-server中的重複記錄

Question

在我們的應用程序中，我們有一些存儲員工數據的表格。我需要找出同一個辦公室是否多次分配給工作人員。我怎樣才能在SQL Server中解決這個問題？

我試過下面的查詢，但它沒有給我正確的解決方案。

SELECT DISTINCT STAFFID, officeid 
FROM [stafftable] 
WHERE rowstatus = 'A' 
GROUP BY STAFFID, officeid 
HAVING COUNT(staffid) > 1 
    AND COUNT(officeid) > 1 
ORDER BY STAFFID, officeid 

它還返回分配給不同辦事處的工作人員。任何幫助將不勝感激。

Answer 1

SELECT * 
FROM (
    SELECT *, RowNum = ROW_NUMBER() OVER (PARTITION BY STAFFID, officeid ORDER BY STAFFID) 
    FROM dbo.stafftable 
    WHERE rowstatus = 'A' 
) t 
WHERE t.RowNum > 1 

Answer 2

;With cte 
as (
select * row_number() over(partition by STAFFID, officeid)as count from stafftable 
where rowstatus = 'A' 
) 
select * from cte where count > 1 

Answer 3

您可以使用COUNT(*)每組計算所有行：

SELECT STAFFID, officeid 
FROM [stafftable] 
WHERE rowstatus = 'A' 
GROUP BY STAFFID, officeid 
HAVING COUNT(*) > 1 
ORDER BY STAFFID, officeid