Return column name and distinct values

Question

Say I have a simple table in postgres as the following:

+--------+--------+----------+
|  Car   |  Pet   |   Name   |
+--------+--------+----------+
| BMW    |           


        

Answer 1

SQL Fiddle

SELECT distinct
       unnest(array['car', 'pet', 'name']) AS col,
       unnest(array[car, pet, name]) AS vals
FROM t
order by col