Question

I have duplicate rows in several SQL Server tables but the IDs are different. Is there a query I can run to delete these rows?

Answer 1

Here is a full example:

create table #test (
id int,
value int
)

insert into #test values (1,2), (2,2), (3,1), (4,2)


delete #test
where id not in ( select min(id) from #test group by value)

drop table #test

It will delete all ids that have the same value, except the min(id).

You just need to alter the group by columns to consider all that are needed to be a duplicate row.