DBA常用命令集锦
　　第一章:日志管理

　　1.forcing log switches

　　sql> alter system switch logfile;

　　2.forcing checkpoints

　　sql> alter system checkpoint;

　　3.adding online redo log groups

　　sql> alter database add logfile [group 4]

　　sql> ('/disk3/log4a.rdo','/disk4/log4b.rdo') size 1m;

　　4.adding online redo log members

　　sql> alter database add logfile member

　　sql> '/disk3/log1b.rdo' to group 1,

　　sql> '/disk4/log2b.rdo' to group 2;

　　5.changes the name of the online redo logfile

　　sql> alter database rename file 'c:/oracle/oradata/oradb/redo01.log'

　　sql> to 'c:/oracle/oradata/redo01.log';

　　6.drop online redo log groups

　　sql> alter database drop logfile group 3;

　　7.drop online redo log members

　　sql> alter database drop logfile member 'c:/oracle/oradata/redo01.log';

　　8.clearing online redo log files

　　sql> alter database clear [unarchived] logfile 'c:/oracle/log2a.rdo';

　　9.using logminer analyzing redo logfiles

　　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;

　　第二章:表空间管理

　　1.create tablespaces

　　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.locally managed tablespace

　　sql> create tablespace user_data datafile 'c:oracleoradatauser_data01.dbf'

　　sql> size 500m extent management local uniform size 10m;

　　3.temporary tablespace

　　sql> create temporary tablespace temp tempfile 'c:oracleoradatatemp01.dbf'

　　sql> size 500m extent management local uniform size 10m;

　　4.change the storage setting

　　sql> alter tablespace app_data minimum extent 2m;

　　sql> alter tablespace app_data default storage(initial 2m next 2m maxextents 999);

　　5.taking tablespace offline or online

　　sql> alter tablespace app_data offline;

　　sql> alter tablespace app_data online;

　　6.read_only tablespace

　　sql> alter tablespace app_data read only|write;

　　7.droping tablespace

　　sql> drop tablespace app_data including contents;

　　8.enableing automatic extension of data files

　　sql> alter tablespace app_data add datafile 'c:oracleoradataapp_data01.dbf' size 200m

　　sql> autoextend on next 10m maxsize 500m;

　　9.change the size fo data files manually

　　sql> alter database datafile 'c:oracleoradataapp_data.dbf' resize 200m;

　　10.Moving data files: alter tablespace

　　sql> alter tablespace app_data rename datafile 'c:oracleoradataapp_data.dbf'

　　sql> to 'c:oracleapp_data.dbf';

　　11.moving data files:alter database

　　sql> alter database rename file 'c:oracleoradataapp_data.dbf'

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