1 状态查询
|
启动状态 |
SQL语句 |
结果 |
|
nomount |
select status from v$instance; |
STARTED |
|
select open_mode from v$database; |
ERROR at line 1: ORA-01507: database not mounted |
|
|
mount |
select status from v$instance; |
MOUNTED |
|
select open_mode from v$database; |
MOUNTED |
|
|
open |
select status from v$instance; |
OPEN |
|
select open_mode from v$database; |
READ WRITE 或者 READ ONLY |
2 实验过程
SQL> startup nomount;
ORACLE instance started.
Total System Global Area 125829120 bytes
Fixed Size 1247684 bytes
Variable Size 92276284 bytes
Database Buffers 25165824 bytes
Redo Buffers 7139328 bytes
SQL> select status from v$instance;
STATUS
------------
STARTED
SQL> select open_mode from v$database;
select open_mode from v$database
*
ERROR at line 1:
ORA-01507: database not mounted
SQL> alter database mount;
Database altered.
SQL> select status from v$instance;
STATUS
------------
MOUNTED
SQL> select open_mode from v$database;
OPEN_MODE
----------
MOUNTED
SQL> alter database open;
Database altered.
SQL> select status from v$instance;
STATUS
------------
OPEN
SQL> select open_mode from v$database;
OPEN_MODE
----------
READ WRITE
