Database collation and Character Set

Hi Team,

We are migrating Oracle 11204 Database to PostgreSQL 9.6.6.
Oracle Character Set details

PARAMETER VALUE
---------------------------------------- --------------------
NLS_CHARACTERSE T WE8ISO8859P1
NLS_NCHAR_CHARA CTERSET AL16UTF16
NLS_SORT BINARY

Postgres Character Set details

Name | Owner | Encoding | Collate | Ctype | Access privileges
-------------+----------+----------+-------------+-------------+-----------------------
postgres | dbauser | UTF8 | en_US.UTF-8 | en_US.UTF-8 |


We observed that sorting (order by)is not working in Postgeres as like Oracle, in internet i have found that if i will change the database "Collate" and "Ctype" to "C" ,then it will work like Oracle, so My question is

If i will change the database "Collate" and "Ctype" to "C" , how it will affect other db operations (i.e. what are the negative impacts on database)?

Thanks