PHP小丑 发表于 2022-1-27 20:13:43

oracle查询字符集语句分享

(1)查看字符集(三条都是等价的)

select * from v$nls_parameterswhere parameter='NLS_CHARACTERSET'
select * fromnls_database_parameters where parameter='NLS_CHARACTERSET'
select * from props$ where name='NLS_CHARACTERSET'


(2)查看国家字符集(三条都是等价的)

select * fromnls_database_parameters where parameter='NLS_NCHAR_CHARACTERSET'
select * fromnls_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 userenv('language') from dual


(4)DataFile操作

--DataFile联机
ALTER 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;


https://www.uoften.com/dbs/oracle/20180415/73094.html
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