Oracle常用命令
一. 日志管理
1. 强制日志切换
sql> alter system switch logfile;
2. 强制检查点
sql> alter system checkpoint;
3. 添加日志组
sql> alter database add logfile [group 4]
sql> ('/disk3/log4a.rdo','/disk4/log4b.rdo') size 1m;
4. 添加联机重做日志成员
sql> alter database add logfile member
sql> '/disk3/log1b.rdo' to group 1,
sql> '/disk4/log2b.rdo' to group 2;
5. 改变联机重做日志成员名
sql> alter database rename file 'c:/oracle/oradata/oradb/redo01.log'
sql> to 'c:/oracle/oradata/redo01.log';
6. 删除联机重做日志组
sql> alter database drop logfile group 3;
7. 删除联机重做日志成员
sql> alter database drop logfile member 'c:/oracle/oradata/redo01.log';
8. 清除联机重做日志文件
sql> alter database clear [unarchived] logfile 'c:/oracle/log2a.rdo';
9. 用logminer分析重做日志文件
a. in the init.ora specify utl_file_dir = ' '
b. sql> execute dbms_logmnr_d.build('oradb.ora','c:oracleoradblog');
c. sql> execute dbms_logmnr_add_logfile('c:oracleoradataoradbredo01.log',
sql> dbms_logmnr.new);
d. sql> execute dbms_logmnr.add_logfile('c:oracleoradataoradbredo02.log',
sql> dbms_logmnr.addfile);
e. sql> execute dbms_logmnr.start_logmnr(dictfilename=> 'c:oracleoradblogoradb.ora');
f. sql> select * from v$logmnr_contents(v$logmnr_dictionary,v$logmnr_parameters
sql> v$logmnr_logs);
g. sql> execute dbms_logmnr.end_logmnr;
二. 表空间管理
1. 创建表空间
sql> create tablespace tablespace_name datafile 'c:oracleoradatafile1.dbf' size 100m,
sql> 'c:oracleoradatafile2.dbf' size 100m minimum extent 550k [logging/nologging]
sql> default storage (initial 500k next 500k maxextents 500 pctinccease 0)
sql> [online/offline] [permanent/temporary] [extent_management_clause]
2. 创建本地管理的表空间
sql> create tablespace user_data datafile 'c:oracleoradatauser_data01.dbf'
sql> size 500m extent management local uniform. size 10m;
3. 创建临时表空间
sql> create temporary tablespace temp tempfile 'c:oracleoradatatemp01.dbf'
sql> size 500m extent management local uniform. size 10m;
4. 改变表空间存储设置
sql> alter tablespace app_data minimum extent 2m;
sql> alter tablespace app_data default storage(initial 2m next 2m maxextents 999);
5. 使表空间脱机/联机
sql> alter tablespace app_data offline;
sql> alter tablespace app_data online;
6. 使表空间只读/可写
sql> alter tablespace app_data read only|write;
7. 删除表空间
sql> drop tablespace app_data including contents;
8. 使数据文件自动扩展
sql> alter tablespace app_data add datafile 'c:oracleoradataapp_data01.dbf' size 200m
sql> autoextend on next 10m maxsize 500m;
9. 手动改变数据文件大小
sql> alter database datafile 'c:oracleoradataapp_data.dbf' resize 200m;
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