Re: How do I get min and max from an array of floating point values

If you use intarray type it is convenient to call buil-in intarray
functions for your purpose.

http://www.postgresql.org/docs/8.3/static/intarray.html

SELECT t.a[1] AS "min", t.a[array_upper(t.a, 1)] AS "max"
FROM (SELECT sort(string_to_array('2,3,4,15,6,7',',')::int[]) AS a)t;

-- 
Best regards, Yuri.