获取所有重复ID | 获取所有重复ID

本文介绍了获取所有重复ID的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一张桌子

I have a table

ProcessID	ID	    DupId
4	        5555	 4444
3	        4444	 3333
2	        3333	 2222
1	        2222	  0
44	        1212	 1111
33	        1111	 1010
22	        1010	  0

If i pass parameter as ProsessID = 4 i need output like this:

ID
5555
4444
3333

If i pass parameter as ProsessID = 44 i need output like this:

ID
1212
1111
1010

Please help

推荐答案

<pre lang="C#">
Declare @i int = 44 -- This will be your process Id
Select P1.Id, P1.DupId, P2.DupId from ProcessTable P1
left join ProcessTable P2 on P1.DupId = P2.Id
where P1.ProcessId = @i
But if your hierarchy is more than 1 then you can use Common Table expresssion.
Also your result will come in single row and not mutiple rows.</pre>

DECLARE @ProcessId AS int = 44;
with Duplicates(ID) as
(
SELECT distinct ID FROM ProcessWithDuplicates where ProcessID = @ProcessId
UNION ALL
SELECT DupId FROM ProcessWithDuplicates where ProcessID = @ProcessId
UNION ALL
(
    SELECT DupId FROM ProcessWithDuplicates where ID IN (SELECT DupId FROM ProcessWithDuplicates where ProcessID = @ProcessId)
        or  DupId in (SELECT DupId FROM ProcessWithDuplicates where ProcessID = @ProcessId)
)
)
select distinct ID from Duplicates;

SELECT DupId FROM ProcessWithDuplicates where ID IN	(SELECT DupId FROM ProcessWithDuplicates where ProcessID = @ProcessId) 
			or  DupId in (SELECT DupId FROM ProcessWithDuplicates where ProcessID = @ProcessId)

你需要。希望这会有所帮助。

You need.Hope this will help.

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