oracle DBA必需掌握的常用命令集锦

      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'

　　sql> to 'c:oracleapp_data.dbf';

　　第三章:表

　　1.create a table

　　sql> create table table_name (column datatype,column datatype]....)

　　sql> tablespace tablespace_name [pctfree integer] [pctused integer]

　　sql> [initrans integer] [maxtrans integer]

　　sql> storage(initial 200k next 200k pctincrease 0 maxextents 50)

　　sql> [logging|nologging] [cache|nocache]

　　2.copy an existing table

　　sql> create table table_name [logging|nologging] as subquery

　　3.create temporary table

　　sql> create global temporary table xay_temp as select * from xay;

　　on commit preserve rows/on commit delete rows

　　4.pctfree = (average row size - initial row size) *100 /average row size

　　pctused = 100-pctfree- (average row size*100/available data space)

　　5.change storage and block utilization parameter

　　sql> alter table table_name pctfree=30 pctused=50 storage(next 500k

　　sql> minextents 2 maxextents 100);

　　6.manually allocating extents

　　sql> alter table table_name allocate extent(size 500k datafile 'c:/oracle/data.dbf');

　　7.move tablespace

　　sql> alter table employee move tablespace users;

　　8.deallocate of unused space

　　sql> alter table table_name deallocate unused [keep integer]

　　9.truncate a table

　　sql> truncate table table_name;

　　10.drop a table

　　sql> drop table table_name [cascade constraints];

　　11.drop a column

　　sql> alter table table_name drop column comments cascade constraints checkpoint 1000;

　　alter table table_name drop columns continue;

　　12.mark a column as unused

　　sql> alter table table_name set unused column comments cascade constraints;

　　alter table table_name drop unused columns checkpoint 1000;

　　alter table orders drop columns continue checkpoint 1000

　　data_dictionary : dba_unused_col_tabs

　　第四章:索引

　　1.creating function-based indexes

　　sql> create index summit.item_quantity on summit.item(quantity-quantity_shipped);

　　2.create a B-tree index

　　sql> create [unique] index index_name on table_name(column,.. asc/desc) tablespace

　　sql> tablespace_name [pctfree integer] [initrans integer] [maxtrans integer]

　　sql> [logging | nologging] [nosort] storage(initial 200k next 200k pctincrease 0

　　sql> maxextents 50);

　　3.pctfree(index)=(maximum number of rows-initial number of rows)*100/maximum number of rows

　　4.creating reverse key indexes

　　sql> create unique index xay_id on xay(a) reverse pctfree 30 storage(initial 200k

　　sql> next 200k pctincrease 0 maxextents 50) tablespace indx;

　　5.create bitmap index

　　sql> create bitmap index xay_id on xay(a) pctfree 30 storage( initial 200k next 200k

　　sql> pctincrease 0 maxextents 50) tablespace indx;

　　6.change storage parameter of index

　　sql> alter index xay_id storage (next 400k maxextents 100);

　　7.allocating index space

　　sql> alter index xay_id allocate extent(size 200k datafile 'c:/oracle/index.dbf');

　　8.alter index xay_id deallocate unused;

　　第五章:约束

　　1.define constraints as immediate or deferred

　　sql> alter session set constraint[s] = immediate/deferred/default;

　　set constraint[s] constraint_name/all immediate/deferred;

　　2. sql> drop table table_name cascade constraints

　　sql> drop tablespace tablespace_name including contents cascade constraints

　　3. define constraints while create a table

　　sql> create table xay(id number(7) constraint xay_id primary key deferrable

　　sql> using index storage(initial 100k next 100k) tablespace indx);

　　primary key/unique/references table(column)/check

　　4.enable constraints

　　sql> alter table xay enable novalidate constraint xay_id;

　　5.enable constraints

　　sql> alter table xay enable validate constraint xay_id;

　　第六章:LOAD数据

　　1.loading data using direct_load insert

　　sql> insert /*+append */ into emp nologging

　　sql> select * from emp_old;

　　2.parallel direct-load insert

　　sql> alter session enable parallel dml;

　　sql> insert /*+parallel(emp,2) */ into emp nologging

　　sql> select * from emp_old;

　　3.using sql*loader

　　sql> sqlldr scott/tiger

　　sql> control = ulcase6.ctl

　　sql> log = ulcase6.log direct=true

　　第七章:数据整理

　　1.using expoty

　　$exp scott/tiger tables(dept,emp) file=c:emp.dmp log=exp.log compress=n direct=y

　　2.using import

　　$imp scott/tiger tables(dept,emp) file=emp.dmp log=imp.log ignore=y

　　3.transporting a tablespace

　　sql>alter tablespace sales_ts read only;

　　$exp sys/.. file=xay.dmp transport_tablespace=y tablespace=sales_ts

　　triggers=n constraints=n

　　$copy datafile

　　$imp sys/.. file=xay.dmp transport_tablespace=y datafiles=(/disk1/sles01.dbf,/disk2

　　/sles02.dbf)

　　sql> alter tablespace sales_ts read write;

　　4.checking transport set

　　sql> DBMS_tts.transport_set_check(ts_list =>'sales_ts' ..,incl_constraints=>true);

　　在表transport_set_violations 中查看

sql> dbms_tts.isselfcontained 为true 是， 表示自包含

第八章: 密码安全与资源管理

　　1.controlling account lock and password

　　sql> alter user juncky identified by oracle account unlock;

　　2.user_provided password function

　　sql> function_name(userid in varchar2(30),password in varchar2(30),

　　old_password in varchar2(30)) return boolean

　　3.create a profile : password setting

　　sql> create profile grace_5 limit failed_login_attempts 3

　　sql> password_lock_time unlimited password_life_time 30

　　sql>password_reuse_time 30 password_verify_function verify_function

　　sql> password_grace_time 5;

　　4.altering a profile

　　sql> alter profile default failed_login_attempts 3

　　sql> password_life_time 60 password_grace_time 10;

　　5.drop a profile

　　sql> drop profile grace_5 [cascade];

　　6.create a profile : resource limit

　　sql> create profile developer_prof limit sessions_per_user 2

　　sql> cpu_per_session 10000 idle_time 60 connect_time 480;

　　7. view => resource_cost : alter resource cost

　　dba_Users,dba_profiles

　　8. enable resource limits

　　sql> alter system set resource_limit=true;

　　第九章:用户管理

　　1.create a user: database authentication

　　sql> create user juncky identified by oracle default tablespace users

　　sql> temporary tablespace temp quota 10m on data password expire

　　sql> [account lock|unlock] [profile profilename|default];

　　2.change user quota on tablespace

　　sql> alter user juncky quota 0 on users;

　　3.drop a user

　　sql> drop user juncky [cascade];

　　4. monitor user

　　view: dba_users , dba_ts_quotas

　　第十章:特权管理

　　1.system privileges: view => system_privilege_map ,dba_sys_privs,session_privs

　　2.grant system privilege

　　sql> grant create session,create table to managers;

　　sql> grant create session to scott with admin option;

　　with admin option can grant or revoke privilege from any user or role;

　　3.sysdba and sysoper privileges:

　　sysoper: startup,shutdown,alter database open|mount,alter database backup controlfile,

　　alter tablespace begin/end backup,recover database

　　alter database archivelog,restricted session

　　sysdba: sysoper privileges with admin option,create database,recover database until

　　4.password file members: view:=> v$pwfile_users

　　5.O7_dictionary_accessibility =true restriction access to view or tables in other schema

　　6.revoke system privil

 

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