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how to delete duplicate rows from table

Answer Posted / navaneethakrishnan

Hi Kumar,

Yes it will delete only the id=1, you have to change the
id=2 whichever u want...

DELETE TOP(1) FROM [tblduplicate] WHERE [ID] = 2
DELETE TOP(1) FROM [tblduplicate] WHERE [ID] = 3

For ur kind information,.. it will delete the duplicate
records only if there is exactly 2 duplication...... if the
id 1 will entered to three times, this query will delete
only one record... because

as we enterd the query as top(1)it will select the top
most and delete the record..


This is the simple query to execute.... there is other ways
also.. to do....


Now use this query to do for more than 2 duplication

DELETE TOP(SELECT COUNT(*) -1 from dbo.tblduplicate where
id = 1)
from dbo.tblduplicate
where id = 1

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