#常用的几个代码
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--查询临时表空间
select name from v$tempfile;
--查询表空间
select name from v$datafile;
修改用户的密码
alter user 用户名 identified by 密码;
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昨天部署好oracle19c后，用以前oracle11g的笔记来创建表空间遇到了坑。这里写一下总结。
其实之所以遇到坑是因为相比于oracle11g,oracle19c多了一个CDB和PDB的概念（从12C开始出现）。
#确定表空间文件存储目录
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[oracle@localhost ~]$ su - oracle
[oracle@localhost ~]$ cd /opt/oracle/oradata/
[oracle@localhost oradata]$ ls
ORCLCDB
[oracle@localhost oradata]$ cd ORCLCDB/
[oracle@localhost ORCLCDB]$ ls
control01.ctl control02.ctl ORCLPDB1 pdbseed redo01.log redo02.log redo03.log sysaux01.dbf system01.dbf temp01.dbf undotbs01.dbf users01.dbf
[oracle@localhost ORCLCDB]$ mkdir anytxn_v2_dev
[oracle@localhost ORCLCDB]$ cd anytxn_v2_dev/
[oracle@localhost anytxn_v2_dev]$ pwd
/opt/oracle/oradata/ORCLCDB/anytxn_v2_dev
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#创建表空间文件
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[oracle@localhost anytxn_v2_dev]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Fri Feb 21 13:38:42 2020
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
SQL> CREATE TEMPORARY TABLESPACE ANYTXN_DEV_DATA_TEMP TEMPFILE '/opt/oracle/oradata/ORCLCDB/anytxn_v2_dev/anytxn_v2_dev_temp.dbf' SIZE 32M AUTOEXTEND ON NEXT 32M MAXSIZE 20480M EXTENT MANAGEMENT LOCAL;
Tablespace created.
SQL> create tablespace ANYTXN_V2_DEV_DATA
logging
datafile '/opt/oracle/oradata/ORCLCDB/anytxn_v2_dev/anytxn_v2_dev_data.dbf'
size 100M
autoextend on
next 100M maxsize 30480M
autoallocate
extent management local
segment space management auto; 2 3 4 5 6 7 8 9
Tablespace created.
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#创建用户
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SQL> create user anytxn_v2_dev identified by "jrx12345" default tablespace ANYTXN_V2_DEV_DATA temporary tablespace ANYTXN_DEV_DATA_TEMP profile DEFAULT;
create user anytxn_v2_dev identified by "jrx12345" default tablespace ANYTXN_V2_DEV_DATA temporary tablespace ANYTXN_DEV_DATA_TEMP profile DEFAULT
*
ERROR at line 1:
ORA-65096: invalid common user or role name
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此错误是因为用户名称不符合规范，Oracle 12C开始引入了CDB与PDB的新特性。sqlplus / as sysdba命令默认登陆的是CDB数据库，而CDB数据库中要求所有新建用户用户名必须以c##开头，否则就会报以上错误，在PDB内创建用户则没有此要求
#修改用户名后创建用户
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SQL> create user c##anytxn_v2_dev identified by "jrx12345" default tablespace ANYTXN_V2_DEV_DATA temporary tablespace ANYTXN_DEV_DATA_TEMP profile DEFAULT;
create user c##anytxn_v2_dev identified by "jrx12345" default tablespace ANYTXN_V2_DEV_DATA temporary tablespace ANYTXN_DEV_DATA_TEMP profile DEFAULT
*
ERROR at line 1:
ORA-65048: error encountered when processing the current DDL statement in
pluggable database ORCLPDB1
ORA-00959: tablespace 'ANYTXN_V2_DEV_DATA' does not exist
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原因是在CDB内创建用户分配表空间时，所分配的表空间必须在PDB和CDB中同时存在，否则会报错。如果是在PDB与CDB有相同表空间的情况下给CDB用户分配表空间，则会分配CDB的表空间，给用户PDB的表空间并不受影响。所以要在PDB内创建相同的表空间，然后再回CDB创建用户
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查询当前数据库名称
SQL> show con_name
CON_NAME
------------------------------
CDB$ROOT
查询PDB数据库名称
SQL> select name,open_mode from v$pdbs;
NAME
--------------------------------------------------------------------------------
OPEN_MODE
------------------------------
PDB$SEED
READ ONLY
ORCLPDB1
READ WRITE
切换数据库
SQL> alter session set container=ORCLPDB1;
Session altered.
SQL> CREATE TEMPORARY TABLESPACE ANYTXN_DEV_DATA_TEMP TEMPFILE '/opt/oracle/oradata/ORCLCDB/ORCLPDB1/anytxn_v2_dev/anytxn_v2_dev_temp.dbf' SIZE 32M AUTOEXTEND ON NEXT 32M MAXSIZE 20480M EXTENT MANAGEMENT LOCAL;
Tablespace created.
SQL> create tablespace ANYTXN_V2_DEV_DATA
logging
datafile '/opt/oracle/oradata/ORCLCDB/ORCLPDB1/anytxn_v2_dev/anytxn_v2_dev_data.dbf'
size 100M
autoextend on
next 100M maxsize 30480M
autoallocate
extent management local
segment space management auto; 2 3 4 5 6 7 8 9
Tablespace created.
SQL> alter session set container=CDB$ROOT;
Session altered.
SQL> create user c##anytxn_v2_dev identified by "jrx12345" default tablespace ANYTXN_V2_DEV_DATA temporary tablespace ANYTXN_DEV_DATA_TEMP profile DEFAULT;
User created.
SQL> GRANT CONNECT,RESOURCE TO c##anytxn_v2_dev;
Grant succeeded.
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如上所示，创建成功，尝试用新用户连接数据库
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[oracle@localhost anytxn_v2_dev]$ sqlplus c##anytxn_v2_dev/jrx12345
SQL*Plus: Release 19.0.0.0.0 - Production on Fri Feb 21 20:46:04 2020
Version 19.3.0.0.0
Copyright (c) 1982, 2019, Oracle. All rights reserved.
Last Successful login time: Fri Feb 21 2020 15:33:39 +08:00
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0
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原文链接：https://www.cnblogs.com/bihuijia/p/15424538.html