PostgreSQL Tips: Most common values

When working on the database schema and query optimization it is always useful to have an idea what are the most common met values in the tables. Below is a query retrieveing such a data for a field FLD in the table TABLE.

  	  array_to_string(most_common_vals, ','), ','
    )) AS integer
  ) AS most_common_vals
FROM pg_stats 
WHERE tablename='TABLE' 
AND attname='FLD'