Question

I have a table with these columns:

1. ID_Table1
2. ID_Table1LinkTable2
3. ID_Table1LinkTable2

I need to find all duplicates by columns ID_Table1LinkTable2, ID_Table1LinkTable2

And drop these rows.

How can I do that?

Thanks for advance

As example I have

ID_Table1  ID_Table1LinkTable2 ID_Table1LinkTable2
--------------------------------------------------    
     1            123                   322
     2            123                   432
     3            123                  3432
     4            123                   322

I need to drop last row

Answer 1

delete from yourtable
where ID_Table1 not in 
(select MIN(ID_Table1) from yourtable group by ID_Table1LinkTable2, ID_Table1LinkTable2)