Comments on: SQL Puzzle: Delete Duplicate Data without Primary key, ROW_NUMBER()

By: Ovidiu-Ionel Samfirescu

Ovidiu-Ionel Samfirescu — Mon, 14 Jan 2019 20:10:56 +0000

DELETE TOP (
SELECT COUNT(*)-1 count FROM tbl_TestTable WHERE id =1 GROUP BY id, name) FROM tbl_TestTable WHERE id = 1

Praful Raut — Wed, 10 Oct 2018 06:11:35 +0000

DELETE TOP(1) FROM #TBL_TESTTABLE WHERE ID IN (SELECT ID FROM #TBL_TESTTABLE GROUP BY ID HAVING COUNT(ID) >=3)

Sadaf — Wed, 29 Aug 2018 19:56:31 +0000

Delete from tableName
Where Field1 NOT IN (
SELECT MAX(Field1) FROM tableName
GROUP BY DuplicateField1, DuplicateField2..)

Lili Rad — Thu, 02 Aug 2018 08:57:49 +0000

This work too:

with cte as
(select *, ROW_NUMBER() over (partition by id order by id) as broj from #tbl_TestTable)
delete from cte where broj > 1

Lili Rad — Thu, 02 Aug 2018 06:27:01 +0000

And this code work 🙂

with cte as
(select *, ROW_NUMBER() over (partition by id order by id) as broj from tbl_TestTable)
delete from cte where broj > 1

Arezou — Tue, 17 Jul 2018 09:31:24 +0000

Hi Mr Patel,Thank you for sharing, but i wrote this query and i got correct result.

delete from dbo.t2
where id in
(
Select id
From dbo.t2
Group By Name,id
Having count(id) >1
)

maniva — Tue, 05 Jun 2018 11:46:26 +0000

thank you for sharing,