How to create new user for ORACLE 19c (CDB ＆ PDB)

ORACLE 19c新建用户

数据据库、用户、CDB与PDB之间的关系

通常在CDB上建立的用户是common user，新建用户名前要加C##。在PDB上创建的用户是local user。

 

在CDB上创建用户

1.Guarante this action under the CDB enviroment.

[[email protected] ~]$ sqlplus system/system as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Wed Jun 29 10:12:29 2022
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> select name,cdb from v$database;

NAME      CDB
--------- ---
ORCLCDB   YES

2. Create New User

SQL> create user C##test identified by testpass;

User created.

3.setting authority

SQL> grant dba,connect,resource,create view to C##test;

Grant succeeded.

SQL> grant create session to C##test;

Grant succeeded.

SQL> grant select any table to C##test;

Grant succeeded.

SQL> grant update any table to C##test;

Grant succeeded.

SQL> grant insert any table to C##test;

Grant succeeded.

SQL> grant delete any table to C##test;

Grant succeeded.

4. Drop user

SQL> drop user C##test cascade;

User dropped.

SQL> 

Create new user on PDB

1. check the PDB name

SQL> select pdb_id,pdb_name,dbid,status,creation_scn from dba_pdbs;

    PDB_ID
----------
PDB_NAME
--------------------------------------------------------------------------------
      DBID STATUS     CREATION_SCN
---------- ---------- ------------
         3
ORCLPDB1
 634705280 NORMAL          2156143

         2
PDB$SEED
1473614105 NORMAL          2014329

    PDB_ID
----------
PDB_NAME
--------------------------------------------------------------------------------
      DBID STATUS     CREATION_SCN
---------- ---------- ------------


SQL> select con_id,dbid,NAME,OPEN_MODE from v$pdbs;

    CON_ID       DBID
---------- ----------
NAME
--------------------------------------------------------------------------------
OPEN_MODE
----------
         2 1473614105
PDB$SEED
READ ONLY

         3  634705280
ORCLPDB1
READ WRITE

    CON_ID       DBID
---------- ----------
NAME
--------------------------------------------------------------------------------
OPEN_MODE
----------

Local User PDB Name is ORCLPDB1

Enter into the PDB enviroment 

SQL> alter session set container=ORCLPDB1;

SQL> alter session set container=ORCLPDB1
  2  ;

Session altered.

New User

SQL> create user test2 identified by test2pass;

User created.

SQL> 

Setting authority

grant dba,connect,resource,create view to test2;
grant select any table to test2;
grant update any table to test2;
grant insert any table to test2;
grant delete any table to test2;
grant create session to test2;

Setting the TNS

If not setting the TNS, it will be failed . error message is user/password error , due to the user on CDB defaultly. need to change the file tnsname.ora on remote linux oracle path network/admin（/opt/oracle/product/19c/dbhome_1/network/admin） 

# tnsnames.ora Network Configuration File: /opt/oracle/product/19c/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORCLCDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = MaxwellDBA)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ORCLCDB)
    )
  )

LISTENER_ORCLCDB =
  (ADDRESS = (PROTOCOL = TCP)(HOST = MaxwellDBA)(PORT = 1521))



ORCLPDB1 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = MaxwellDBA)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ORCLPDB1)
    )
  )

LISTENER_ORCLPDB1 =
  (ADDRESS = (PROTOCOL = TCP)(HOST = MaxwellDBA)(PORT = 1521))

 Login user: