How to get duplicate rows in a large table

I have a table which consists of 26 columns and 2 milion records..while doing validation i suspect there are duplicate records in that table...
Is there any way to check duplicate rows in a table?

I went through link..in all the messages query is for 2 or 3 columns...but my scenario is i have 26 columns ...and i suspect there is duplicate row inserting .for which value is same for all 26 columns .how should i do .?
do i need to do group by all 26 columns and do having count(*) ...26 times?

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For getting the row index use the following code.
DATA lo_nd_node TYPE REF TO if_wd_context_node.
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How to check duplicate in a very large table

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How to get the row difference from two tables

I am not good at SQL. Here is a problem I am having
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if i understand your requirement correctly try this:
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How to Delete duplicates rows without using rowid/distinct.

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How about:
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SQL> DELETE FROM t1
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1 row deleted.
SQL> /
1 row deleted.
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0 rows deleted.
SQL> SELECT * FROM t1;
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How to restrict duplicate rows..

Dear Guru's..
I have below query.. When i run this query i need to get two rows.. But iam getting two more duplicate rows.. I want to restrict these two rows..
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SELECT DISTINCT B.TIC_ID, B.TIC_ISS_NO,
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Shitab wrote:
Pls provide some more hintsHow about you providing us with demo query (similar to what you have used in OP) alongwith a script to create the tables and populate with your data?
Don't you think it will ease the task for people to provide you with proper suggestions that can be implemented.
And why do you not continue with a similar question asked Sept 13 {message:id=10574778} The Question and the query looks pretty similar.

How to update duplicate row from table

Hi,
how to update duplicate row from table?
First to find duplicate row then update duplicate row with no to that duplicate row in oracle.
can you give me suggestion on it?
Thanks in advance.
your early response is appreciated...

In order to find a duplicate row, see:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1224636375004
(or search this forum, your question has been asked before)
In order to update it, just create and use an Oracle sequence, have it start and increment at a value that doesn't exist in your table.
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How to get duplicate rows in a large table

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