一、查看字符集

SQL> select * from v$version;BANNER                                                                               CON_ID-------------------------------------------------------------------------------- ----------Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production              0PL/SQL Release 12.1.0.2.0 - Production                                                    0CORE    12.1.0.2.0      Production                                                                0TNS for Linux: Version 12.1.0.2.0 - Production                                            0NLSRTL Version 12.1.0.2.0 - Production                                                    0SQL> select * from nls_database_parameters;PARAMETER                      VALUE------------------------------ ------------------------------NLS_RDBMS_VERSION              12.1.0.2.0NLS_NCHAR_CONV_EXCP            FALSENLS_LENGTH_SEMANTICS           BYTENLS_COMP                       BINARYNLS_DUAL_CURRENCY              $NLS_TIMESTAMP_TZ_FORMAT        DD-MON-RR HH.MI.SSXFF AM TZRNLS_TIME_TZ_FORMAT             HH.MI.SSXFF AM TZRNLS_TIMESTAMP_FORMAT           DD-MON-RR HH.MI.SSXFF AMNLS_TIME_FORMAT                HH.MI.SSXFF AMNLS_SORT                       BINARYNLS_DATE_LANGUAGE              AMERICANPARAMETER                      VALUE------------------------------ ------------------------------NLS_DATE_FORMAT                DD-MON-RRNLS_CALENDAR                   GREGORIANNLS_NUMERIC_CHARACTERS         .,NLS_NCHAR_CHARACTERSET         AL16UTF16NLS_CHARACTERSET               AL32UTF8NLS_ISO_CURRENCY               AMERICANLS_CURRENCY                   $NLS_TERRITORY                  AMERICANLS_LANGUAGE                   AMERICAN20 rows selected.

二、修改字符集

SQL> shutdown immediate;Database closed.Database dismounted.ORACLE instance shut down.SQL> startup mount;ORACLE instance started.Total System Global Area 1778384896 bytesFixed Size                  2925408 bytesVariable Size            1627393184 bytesDatabase Buffers          134217728 bytesRedo Buffers               13848576 bytesDatabase mounted.SQL> alter session set sql_trace=true; Session altered.SQL> alter system enable restricted session; System altered.SQL> alter system set job_queue_processes=0; System altered.SQL> alter system set aq_tm_processes=0;System altered.SQL> alter database open;Database altered.SQL> ALTER DATABASE CHARACTER SET INTERNAL_USE ZHS16GBK;Database altered.SQL> shutdown immediate;Database closed.Database dismounted.ORACLE instance shut down.SQL> SQL> startupORACLE instance started.Total System Global Area 1778384896 bytesFixed Size                  2925408 bytesVariable Size            1627393184 bytesDatabase Buffers          134217728 bytesRedo Buffers               13848576 bytesDatabase mounted.Database opened.SQL> select userenv('language') from dual;USERENV('LANGUAGE')----------------------------------------------------AMERICAN_AMERICA.ZHS16GBKSQL> select * from nls_database_parameters;PARAMETER                      VALUE------------------------------ ------------------------------NLS_RDBMS_VERSION              12.1.0.2.0NLS_NCHAR_CONV_EXCP            FALSENLS_LENGTH_SEMANTICS           BYTENLS_COMP                       BINARYNLS_DUAL_CURRENCY              $NLS_TIMESTAMP_TZ_FORMAT        DD-MON-RR HH.MI.SSXFF AM TZRNLS_TIME_TZ_FORMAT             HH.MI.SSXFF AM TZRNLS_TIMESTAMP_FORMAT           DD-MON-RR HH.MI.SSXFF AMNLS_TIME_FORMAT                HH.MI.SSXFF AMNLS_SORT                       BINARYNLS_DATE_LANGUAGE              AMERICANPARAMETER                      VALUE------------------------------ ------------------------------NLS_DATE_FORMAT                DD-MON-RRNLS_CALENDAR                   GREGORIANNLS_NUMERIC_CHARACTERS         .,NLS_NCHAR_CHARACTERSET         AL16UTF16NLS_CHARACTERSET               ZHS16GBKNLS_ISO_CURRENCY               AMERICANLS_CURRENCY                   $NLS_TERRITORY                  AMERICANLS_LANGUAGE                   AMERICAN20 rows selected.-需要修改回来JOB_QUEUE_PROCESSES 默认1000AQ_TM_PROCESSES  默认10485760