新裝了oracle12c，對新的CDB和PDB用戶如何登錄一直一頭霧水，經過一晚上的查找，終於解決。

1. sqlplus /nolog -> conn /as sysdba 登錄到oracle

2. 將session切換到PDB下alter session set container=pdborcl

3. 建立表空間create tablespace tablespace_name datafile ‘/home/oracle/var/data/tablespace_name.dbf‘ size 500m autoextend on;

4. 查看表空間select tablespace_name,file_id,file_name from dba_data_files;

5. 建立用戶create user table_name identified by password default tablespace tablespace_name;

6. 對用戶授權grant dba to toolbar;

7. 提交commit；

8. conn toolbar/toolbar@pdborcl
   ERROR:
   ORA-01017: invalid username/password; logon denied

   始終無法登錄

9. 設置TNS_ADMIN

   export TNS_ADMIN=/home/oracle/app/oracle/product/12.1.0/dbhome_2/network/admin

   依舊沒有解決

10. conn toolbar/toolbar@orcl
    ERROR:
    ORA-12514: TNS:listener does not currently know of service requested in connect
    descriptor

    出現TNS錯誤，應該是TNS腳本的問題

11. 查看services，發現應該是pdborcl的服務名有問題

    select name,pdb from v$services;
    
    NAME PDB
    ------------------------------ ------------------------------
    pdborcl.localdomain PDBORCL
    orclXDB CDB$ROOT
    orcl.localdomain CDB$ROOT
    SYS$BACKGROUND CDB$ROOT
    SYS$USERS CDB$ROOT

12. 在tnsnames.ora裏面加入

    PDBORCL =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
    (SERVER = DEDICATED)
    (SERVICE_NAME = pdborcl.localdomain)
    )
    )

13. conn toolbar/toolbar@PDBORCL
    Connected.

    OK啦

    ^_^祝玩得愉快

關於Oracle 12C pdb用戶無法登錄的問題