How to delete duplicates in SQL table based on multiple fields

Question

I have a table of games, which is described as follows:

+---------------+-------------+------+-----+---------+----------------+
| Field         | Type                


        

Answer 1

To get list of duplicate entried matching two fields

select t.ID, t.field1, t.field2
from (
  select field1, field2
  from table_name
  group by field1, field2
  having count(*) > 1) x, table_name t
where x.field1 = t.field1 and x.field2 = t.field2
order by t.field1, t.field2

And to delete all the duplicate only

DELETE x 
FROM table_name x
JOIN table_name y
ON y.field1= x.field1
AND y.field2 = x.field2
AND y.id < x.id;