1.oracle 12c基础

1.查看数据库的创建模式
SQL> select name,cdb,con_id from v$database;

NAME CDB CON_ID

--------- --------- ----------

ORA12C YES 0
显示yes为数据库为CDB模式

2.查看ROOT容器名字
SQL> show con_name

CON_NAME

------------------------------

CDB$ROOT

SQL> select sys_context('userenv','con_name') from dual;

SYS_CONTEXT('USERENV','CON_NAME')

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CDB$ROOT