Oracle数据库的状态查询

1 状态查询

启动状态	SQL语句	结果
nomount	select status from v$instance;	STARTED
nomount	select open_mode from v$database;	ERROR at line 1:ORA-01507: database not mounted
mount	select status from v$instance;	MOUNTED
mount	select open_mode from v$database;	MOUNTED
open	select status from v$instance;	OPEN
open	select open_mode from v$database;	READ WRITE 或者 READ ONLY

2 实验过程SQL> startup nomount;Oracle instance started. Total System Global Area 125829120 bytesFixed Size 1247684 bytesVariable Size 92276284 bytesDatabase Buffers 25165824 bytesRedo 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查看 Oracle 是用spfile 启动还是 pfile 启动alter database操作相关资讯 Oracle数据库 Oracle入门教程 oracle数据库教程

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