Oracle19c基本操作

Posted 2023-04-01

参考技术A 0、查看db
show con_name
show pdbs
1、cdb切换至pdb
alter session set container=pdb;
2、pdb切换至cdb
alter session set container=cdb$root;
3、pdb更改字符集（cdb的字符集必须为al32utf8）
alter system enable restricted session; （恢复操作为alter system disable...）
alter database character set internal_use zhs16gbk;
注：使用低版本的client在不同字符集的pdb之间切换会报错：ora-24964
4、实例启动后自动打开所有pdb
CREATE OR REPLACE TRIGGER open_pdbs AFTER STARTUP ON DATABASE
BEGIN
EXECUTE IMMEDIATE 'ALTER PLUGGABLE DATABASE ALL OPEN';
END open_pdbs;
5、pdb克隆
create pluggable database pdb2 from pdb1 file_name_convert=('pdb1path','pdb2path');

Oracle忘记用户名和密码

Microsoft Windows [版本 10.0.16299.192]
(c) 2017 Microsoft Corporation。保留所有权利。

C:\WINDOWS\system32>echo %ORACLE_SID%
%ORACLE_SID%

C:\WINDOWS\system32>set ORACLE_SID=fast

C:\WINDOWS\system32>sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on 星期五 2月 2 17:03:37 2018

Copyright (c) 1982, 2014, Oracle. All rights reserved.

连接到:
Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

SQL> alter user fast identified by "fast*123";
alter user fast identified by "fast*123"
*
第 1 行出现错误:
ORA-01918: 用户 ‘FAST‘ 不存在

SQL> alter user sys identified by fast*123;
alter user sys identified by fast*123
*
第 1 行出现错误:
ORA-00922: 选项缺失或无效

SQL> alter user sys identified by fast*123;
alter user sys identified by fast*123
*
第 1 行出现错误:
ORA-00922: 选项缺失或无效

SQL> alter user sys identified by "fast*123";

用户已更改。

SQL> alter user system identified by "manager";

用户已更改。

SQL> create user fast identified by "fast*123";
create user fast identified by "fast*123"
*
第 1 行出现错误:
ORA-65096: 公用用户名或角色名无效

SQL> create user "c##fast" identified by "fast*123";

用户已创建。

SQL> grant connect,resource,dba to "c##fast"
2
SQL> grant connect,resource,dba to "c##fast";

授权成功。

SQL> commit;

提交完成。

SQL>