Linux下oracle修改字符集
阿新 • • 發佈:2019-02-13
在Redhat上安裝Oracle 10g沒有設定字符集,採用的是作業系統預設字符集:WE8ISO8859P1,將字符集修改為:ZHS16GBK。由於過程不可逆,首先需要備份資料庫。
1.資料庫全備
2.查詢當前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET WE8ISO8859P1
3.關閉資料庫
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
4.啟動資料庫到mount狀態
SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.
5.限制session
SQL> alter system enable restricted session;
System altered.
6.查詢相關引數並修改
SQL> show parameter job_queue_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
job_queue_processes integer 10
SQL> show parameter aq_tm_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes integer 0
SQL> alter system set job_queue_processes=0;
System altered.
7.開啟資料庫
SQL> alter database open;
Database altered.
8.修改字符集
SQL> alter database character set ZHS16GBK;
alter database character set ZHS16GBK
*
ERROR at line 1:
ORA-12712: new character set must be a superset of old character set
出現錯誤提示,新字符集必須是老字符集的超集,也就原來字符集是新字符集的子集,可以再Oracle官方文件上查詢字符集包含關係。下面使用Oracle內部命令internal_use,跳過超集檢查,生產環境不建議使用此方法。
SQL> alter database character set internal_use ZHS16GBK;
Database altered.
9.查詢當前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET ZHS16GBK
10.關閉資料庫
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
11.啟動資料庫到mount狀態
SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.
12.將相關引數改回原來值
SQL> alter system set job_queue_processes=10;
System altered.
13.開啟資料庫
SQL> alter database open;
1.資料庫全備
2.查詢當前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET WE8ISO8859P1
3.關閉資料庫
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
4.啟動資料庫到mount狀態
SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.
5.限制session
SQL> alter system enable restricted session;
System altered.
6.查詢相關引數並修改
SQL> show parameter job_queue_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
job_queue_processes integer 10
SQL> show parameter aq_tm_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes integer 0
SQL> alter system set job_queue_processes=0;
System altered.
7.開啟資料庫
SQL> alter database open;
Database altered.
8.修改字符集
SQL> alter database character set ZHS16GBK;
alter database character set ZHS16GBK
*
ERROR at line 1:
ORA-12712: new character set must be a superset of old character set
出現錯誤提示,新字符集必須是老字符集的超集,也就原來字符集是新字符集的子集,可以再Oracle官方文件上查詢字符集包含關係。下面使用Oracle內部命令internal_use,跳過超集檢查,生產環境不建議使用此方法。
SQL> alter database character set internal_use ZHS16GBK;
Database altered.
9.查詢當前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET ZHS16GBK
10.關閉資料庫
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
11.啟動資料庫到mount狀態
SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.
12.將相關引數改回原來值
SQL> alter system set job_queue_processes=10;
System altered.
13.開啟資料庫
SQL> alter database open;
Database altered.