(1)查看字符集（三条都是等价的）
代码如下:
select * from v$nls_parameters where parameter='NLS_CHARACTERSET'
select * from nls_database_parameters where parameter='NLS_CHARACTERSET'
select * from props$ where name='NLS_CHARACTERSET'
(2)查看国家字符集（三条都是等价的）select * from nls_database_parameters where parameter='NLS_CHARACTERSET'
select * from props$ where name='NLS_CHARACTERSET'
代码如下:
select * from nls_database_parameters where parameter='NLS_NCHAR_CHARACTERSET'
select * from nls_database_parameters where parameter='NLS_NCHAR_CHARACTERSET'
select * from props$ where name='NLS_NCHAR_CHARACTERSET'
(3)查看oracle server端的字符集select * from nls_database_parameters where parameter='NLS_NCHAR_CHARACTERSET'
select * from props$ where name='NLS_NCHAR_CHARACTERSET'
代码如下:
select userenv('language') from dual
(4)DataFile操作 代码如下:
--DataFile联机
ALTER TABLESPACE BSS11 ONLINE
ALTER DATABASE 'BSS_03.dbf' ONLINE
原文链接：https://www.f2er.com/oracle/65387.htmlALTER TABLESPACE BSS11 ONLINE
ALTER DATABASE 'BSS_03.dbf' ONLINE
--DataFile脱机
ALTER TABLESPACE BSS11 OFFLINE --作用对象：表空间BSS11的所有datafile
ALTER DATABASE 'BSS_03.dbf' OFFLINE ---作用对象：BSS_03.dbf，就一个datafile--resize datafile
ALTER DATABASE DATAFILE 'BSS_03.dbf' RESIZE 500M;
