MySQL IN() for two value/array?

Question

I\'m having trouble finding a better way to search MySQL for a pair of values in a table. I have the value pairs in an array, and would like to duplicate the IN() function, but

Answer 1

Great answers from @Quassnoi and @KM !!!

Also, you can get pairs duplicates and select them for post-processing:

SELECT *
FROM `foo`
WHERE (`id_obj` , `Foo_obj`)
IN (
  SELECT `id_obj` , `Foo_obj`
  FROM `foo`
  GROUP BY `id_obj` , `Foo_obj`
  HAVING count(*) > 1
)