collation from an external file

hello everybody,
I'm new of the world postgresql, so please help me. I can't understand how
to define a new collation from an external file. I have a DB and i have to
define a new collection for all the column so i try to use:
CREATE COLLATION mycollation FROM "it-IT"
but i don't know how to add my cases of preferences ( preferences example:
b     B, c     C,d     D,e     E,é     É)
thanks for help me




--
View this message in context: http://postgresql.1045698.n5.nabble.com/collation-from-an-external-file-tp5810849.html
Sent from the PostgreSQL - novice mailing list archive at Nabble.com.