各种alter database操作
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1 alter database:修改数据文件
alter database datafile 4 offline;
alter database datafile '/opt/Oracle/datafile/users01.dbf' offline;
alter database datafile '/opt/Oracle/datafile/users01.dbf' resize 100M;
alter database datafile '/opt/Oracle/datafile/users01.dbf' autoextend on next 100M maxsize 1000M;
alter database datafile 4 end backup;
2 alter database:修改临时文件(tempfile)
alter database tempfile 4 resize 100M;
alter database tempfile 4 autoextend on next 100M maxsize 1000M;
alter database tempfile 4 drop including datafiles;
alter database tempfile 4 offline;
3 alter database:归档日志(archivelog)模式命令
alter database archivelog;
alter database noarchivelog;
alter database force logging;
alter database clear logfile '/opt/Oracle/logfiles/redo01.rdo';
alter database clear unarchived logfile '/opt/Oracle/logfiles/redo01.rdo';
alter database add supplemental log data;
alter database add supplemental log data (primary key,unique);
alter database drop supplemental log data;
4 alter database:控制文件操作
alter database backup controlfile to trace;
alter database backup controlfile to trace as '/opt/Oracle/logfile_backup/backup_logfile.trc' reuse resetlogs;
alter database backup controlfile to '/opt/Oracle/logfile_backup/backup_logfile.ctl';
5 alter database:创建数据文件
alter database create datafile '/opt/Oracle/datafile/users01.dbf' as '/opt/oracle/datafile/users01.dbf';
alter database create datafile 4 as '/opt/Oracle/datafile/users01.dbf';
alter database create datafile '/opt/Oracle/datafile/users01.dbf' as new;
6 alter database:日志文件命令
alter database add logfile group 2 ('/opt/Oracle/logfiles/redo02a.rdo','/opt/oracle/logfile/redo02b.rdo') size 300M reuse;
alter database add logfile member '/opt/Oracle/logfiles/redo02c.rdo' to gourp 2
alter database add logfile thread 3 group 2 ('/opt/Oracle/logfiles/redo02a.rdo','/opt/oracle/logfiles/redo02b.rdo') size 300M reuse;
alter database drop logfile group 3
alter database drop logfile member '/opt/Oracle/logfiles/redo02b.rdo';
7 alter database:安装和打开数据库
alter database mount;
alter database open;
8 alter database:移动或重命名数据库文件或联机重做日志
注意:数据库必须已经安装才能重命名或移动联机重做日志。数据库必须已经安装或数据文件处于脱机状态时,才能移动数据库中的数据文件。
alter database rename file '/ora/datafile/oldfile.dbf' to '/ora/datafile/newfile.dbf';
9 alter database:以只读方式打开数据库
alter database open read only;
10 alter database:使用resetlogs打开数据
alter database open resetlogs;
11 alter database:恢复数据库
对数据库的恢复,建议使用recover命令代替。
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