test=# insert into test values ('_Common_');
INSERT 0 1
test=# insert into test values ('A common');
INSERT 0 1
test=# insert into test values ('Access levels');
INSERT 0 1
test=# select foo from test order by foo;
      foo      
---------------
 Access levels
 A common
 _Common_
(3 rows)

test=# select foo from test order by foo desc;
      foo      
---------------
 _Common_
 A common
 Access levels
(3 rows)