[英]Change NLS Character set parameters on Oracle 11g XE
I am using Oracle 11g Express Edition. 我正在使用Oracle 11g Express Edition。 Currently when I check NLS character set parameter using
SELECT * FROM nls_database_parameters;
目前,当我使用
SELECT * FROM nls_database_parameters;
检查NLS字符集参数时SELECT * FROM nls_database_parameters;
it gives the default values: 它给出了默认值:
NLS_CHARACTERSET: AL32UTF8
NLS_NCHAR_CHARACTERSET: AL16UTF16
I want to set both these parameters to UTF8. 我想将这两个参数设置为UTF8。 How can I do so?
我怎么能这样做? I have just installed Oracle 11g XE, so there is not data except those required by Oracle itself.
我刚刚安装了Oracle 11g XE,因此除了Oracle本身所需的数据之外,没有数据。
This worked for me where an application was checking for UTF8 rather than AL32UTF8
. 这适用于我的应用程序正在检查
UTF8 rather than AL32UTF8
。
SQL> shutdown immediate;
SQL> startup restrict
SQL> select name from v$database;
SQL> ALTER DATABASE CHARACTER SET INTERNAL_USE UTF8 ;
SQL> select value from NLS_DATABASE_PARAMETERS
where parameter=’NLS_CHARACTERSET’;
SQL> shutdown immediate;
SQL> startup
Maybe this works: alter database character set UTF8;
也许这样可行: --> Not supported anymore on Oracle 10.1 or later. alter database character set UTF8;
- >在Oracle 10.1或更高版本上不再支持。
However, are you really sure to change it? 但是,你真的确定要改变它吗?
AL32UTF8
is UTF-8, actually. 实际上,
AL32UTF8
是 UTF-8。
On Oracle you have also a character set called UTF8
, this is a kind of misnomer and means Character set CESU-8 . 在Oracle上你还有一个名为
UTF8
的字符集,这是一种用词不当并且意味着字符集CESU-8 。 As far as I know this is like "UTF-8 as of Unicode version 3 from 1999". 据我所知,这就像“1999年Unicode版本3的UTF-8”。 As long as you use Unicode characters less than 65535 (Basic Multilingual Plane)
AL32UTF8
and UTF8
are identical. 只要使用小于65535(基本多语言平面)的Unicode字符,
AL32UTF8
和UTF8
就完全相同。
Note, this command works only if the new character set is a strict superset of old character set. 请注意,仅当新字符集是旧字符集的严格超集时,此命令才有效。 Ie you can change from
US7ASCII
to AL32UTF8
or WE8ISO8859P1
but you cannot change from WE8ISO8859P1
to AL32UTF8
. 即您可以从
US7ASCII
更改为AL32UTF8
或WE8ISO8859P1
但您无法从WE8ISO8859P1
更改为AL32UTF8
。
You can't change the character set once you set installation. 设置安装后,无法更改字符集 。 If you want to change then there is long procedure for which you need to raise SR with Oracle.
如果您想要更改,那么您需要使用Oracle提升SR的长程序。
SQL> shutdown immediate;
SQL> startup restrict
SQL> select name from v$database;
SQL> ALTER DATABASE CHARACTER SET INTERNAL_USE WE8MSWIN1252 ;
SQL> select value from NLS_DATABASE_PARAMETERS where parameter=’NLS_CHARACTERSET’;
SQL> shutdown immediate;
SQL> startup
SQL> select value from NLS_DATABASE_PARAMETERS where parameter=’NLS_CHARACTERSET’;
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