Hvorfor svarer Oracles varchar-sorteringsrækkefølge ikke til varchar-sammenligningens adfærd?

Peter,

sorteringens adfærd reguleres af NLS_SORT sessionsparameter, hvorimod adfærden for sammenligninger afhænger af NLS_COMP parameter. Du må have et misforhold.

Jeg opnår det samme resultat som du gør med følgende parametre:

SQL> SELECT *
  2    FROM nls_session_parameters
  3   WHERE parameter IN ('NLS_COMP', 'NLS_SORT');

PARAMETER                      VALUE
------------------------------ ----------------------------------------
NLS_SORT                       FRENCH
NLS_COMP                       BINARY

Men når de to matches, er resultatet konsistent:

SQL> alter session set nls_comp=LINGUISTIC;

Session altered

SQL> select * from (
  2    select '000000000000' as x from dual
  3    union
  4    select '978123456789' as x from dual
  5    union
  6    select 'B002AACD0A' as x from dual
  7  ) /*where x>'000000000000'*/ order by x;

X
------------
B002AACD0A
000000000000
978123456789

SQL> select * from (
  2    select '000000000000' as x from dual
  3    union
  4    select '978123456789' as x from dual
  5    union
  6    select 'B002AACD0A' as x from dual
  7  ) where x > '000000000000' order by x;

X
------------
978123456789