Returning the 'last' row of each 'group by' in MySQL

Question

Is there a more efficient way of doing the following?

select * 
    from foo as a
    where a.id = (select max(id) from foo where uid = a.uid group by uid)
          


        

Answer 1

Returning the last row of each GROUP BY in MySQL with WHERE clause:

SELECT *
FROM foo
WHERE id IN (
  SELECT Max(id)
  FROM foo
  WHERE value='XYZ'
  GROUP BY u_id
)
LIMIT 0,30