How to change NLS parameters in SQL Developer?

Question

I think that Oracle National Language Support is quite confusing. How can I easily change NLS parameters for SQL Developer (for all connections) to match exactly those that my database is using?

Answer 1

Hello,
SELECT 5/8 x FROM dual;F9 -> 0.625
Change decimal separator in preferences
F9 -> 0,625
It is different when I execute a query/script with F5, then I always get 0.625
SELECT * FROM nls_session_parameters
WHERE parameter = 'NLS_NUMERIC_CHARACTERS';
PARAMETER                      VALUE
NLS_NUMERIC_CHARACTERS         .,
SELECT 5/8 x FROM dual;
         X
     0.625
Change settings
SELECT * FROM nls_session_parameters
WHERE parameter = 'NLS_NUMERIC_CHARACTERS';
PARAMETER                      VALUE
NLS_NUMERIC_CHARACTERS         ,.
SELECT 5/8 x FROM dual;
         X
     0.625Even changing the settings with ALTER SESSION makes no difference
ALTER SESSION SET NLS_NUMERIC_CHARACTERS = ',.';
SELECT * FROM nls_session_parameters
WHERE parameter = 'NLS_NUMERIC_CHARACTERS';
PARAMETER                      VALUE
NLS_NUMERIC_CHARACTERS         ,.
SELECT 5/8 x FROM dual;
         X
     0.625
ALTER SESSION SET NLS_NUMERIC_CHARACTERS = '.,';
SELECT * FROM nls_session_parameters
WHERE parameter = 'NLS_NUMERIC_CHARACTERS';
PARAMETER                      VALUE
NLS_NUMERIC_CHARACTERS         .,
SELECT 5/8 x FROM dual;
         X
     0.625It seems the script output does not care about my settings :-(
Regards
Marcus