SQL ORACLE Polish letters translate

Question

I want find a solutions to change letters in sql In Polish language we have 'ą','ć','ł','ń'

when i make select lower(translate(sname,'łńą','lna')) from emplo it dosn't work as it should be.

help friends :)

Answer 1

The polish letters are stored with the same ascii value as the west european letters, eg

select ascii('Ł'), ascii('ł'), ascii('L'), ascii('l') from dual;

>> 76 108 76 108

You can change the representation by changing the character set:

select convert('Fuß', 'WE8ISO8859P1', 'US7ASCII') from dual

>> Fu¿

Find character sets supported by Oracle by:

select * from  V$NLS_VALID_VALUES where parameter = 'CHARACTERSET'

Polish character set is ISO 8859-2 (Eastern European)