oracle歷史命令

⑴ 關於oracle命令

alter table 表名 modify 欄位名 not null;
不過你那個欄位要是原來有空的，你執行會報錯

⑵ oracle歷史命令如何查看

windows 環境下用方向鍵上下來查看,

linux 下用rlwrap 包裝

單純查執行過的sql 可以查V$sql 和v$sqlarea

⑶ oracle 如何上翻回前一條命令

l (或L)
linux的話輸入
sql>define_editor=vi
然後每次只需要輸入ed就能進入vi編輯模式了。完成後只需要輸入「/」就能重新執行編輯好的內容。
windows的話直接輸入edit就能修改緩存區里的內容了。

⑷ 干貨-Oracle里的常用命令

本文轉自：51Testing軟體測試網。（http://www.51testing.com/html/27/n-7827.html）

      第一章：日誌管理

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:\oracle\oradb\log');

c. sql> execute dbms_logmnr_add_logfile('c:\oracle\oradata\oradb\redo01.log',

sql> dbms_logmnr.new);

d. sql> execute dbms_logmnr.add_logfile('c:\oracle\oradata\oradb\redo02.log',

sql> dbms_logmnr.addfile);

e. sql> execute dbms_logmnr.start_logmnr(dictfilename=>'c:\oracle\oradb\log\oradb.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：表空間管理

1.create tablespaces

sql> create tablespace tablespace_name datafile 'c:\oracle\oradata\file1.dbf' size 100m,

sql> 'c:\oracle\oradata\file2.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:\oracle\oradata\user_data01.dbf'

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

3.temporary tablespace

sql> create temporary tablespace temp tempfile 'c:\oracle\oradata\temp01.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:\oracle\oradata\app_data01.dbf' size 200m

sql> autoextend on next 10m maxsize 500m;

9.change the size fo data files manually

sql> alter database datafile 'c:\oracle\oradata\app_data.dbf' resize 200m;

10.Moving data files: alter tablespace

sql> alter tablespace app_data rename datafile 'c:\oracle\oradata\app_data.dbf'

sql> to 'c:\oracle\app_data.dbf';

11.moving data files:alter database

sql> alter database rename file 'c:\oracle\oradata\app_data.dbf'

sql> to 'c:\oracle\app_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. 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：約束

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數據

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：reorganizing data

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

$ 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 為true 是， 表示自包含

第八章：managing password security and resources

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：Managing users

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：managing privileges

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 privilege

sql> revoke create table from karen;

sql> revoke create session from scott;

7.grant object privilege

sql> grant execute on dbms_pipe to public;

sql> grant update(first_name,salary) on employee to karen with grant option;

8.display object privilege : view => dba_tab_privs, dba_col_privs

9.revoke object privilege

sql> revoke execute on dbms_pipe from scott [cascade constraints];

10.audit record view :=> sys.aud$

11. protecting the audit trail

sql> audit delete on sys.aud$ by access;

12.statement auditing

sql> audit user;

13.privilege auditing

sql> audit select any table by summit by access;

14.schema object auditing

sql> audit lock on summit.employee by access whenever successful;

15.view audit option : view=> all_def_audit_opts,dba_stmt_audit_opts,

dba_priv_audit_opts,dba_obj_audit_opts

16.view audit result: view=> dba_audit_trail,dba_audit_exists,dba_audit_object,

dba_audit_session,dba_audit_statement

第十一章： manager role

1.create roles

sql> create role sales_clerk;

sql> create role hr_clerk identified by bonus;

sql> create role hr_manager identified externally;

2.modify role

sql> alter role sales_clerk identified by commission;

sql> alter role hr_clerk identified externally;

sql> alter role hr_manager not identified;

3.assigning roles

sql> grant sales_clerk to scott;

sql> grant hr_clerk to hr_manager;

sql> grant hr_manager to scott with admin option;

4.establish default role

sql> alter user scott default role hr_clerk,sales_clerk;

sql> alter user scott default role all;

sql> alter user scott default role all except hr_clerk;

sql> alter user scott default role none;

5.enable and disable roles

sql> set role hr_clerk;

sql> set role sales_clerk identified by commission;

sql> set role all except sales_clerk;

sql> set role none;

6.remove role from user

sql> revoke sales_clerk from scott;

sql> revoke hr_manager from public;

7.remove role

sql> drop role hr_manager;

8.display role information

view: =>dba_roles,dba_role_privs,role_role_privs,dba_sys_privs,

role_sys_privs,role_tab_privs,session_roles

第十二章: BACKUP and RECOVERY

1. v$sga,v$instance,v$process,v$bgprocess,v$database,v$datafile,v$sgastat

2. Rman need set dbwr_IO_slaves or backup_tape_IO_slaves and large_pool_size

3. Monitoring Parallel Rollback

> v$fast_start_servers , v$fast_start_transactions

4.perform a closed database backup (noarchivelog)

> shutdown immediate

> cp files /backup/

> startup

5.restore to a different location

> connect system/manager as sysdba

> startup mount

> alter database rename file '/disk1/../user.dbf' to '/disk2/../user.dbf';

> alter database open;

6.recover syntax

--recover a mounted database

>recover database;

>recover datafile '/disk1/data/df2.dbf';

>alter database recover database;

--recover an opened database

>recover tablespace user_data;

>recover datafile 2;

>alter database recover datafile 2;

7.how to apply redo log files automatically

>set autorecovery on

>recover automatic datafile 4;

8.complete recovery:

--method 1(mounted databae)

> c:\backup\user.dbf c:\oradata\user.dbf

>startup mount

>recover datafile 'c:\oradata\user.dbf;

>alter database open;

--method 2(opened database,initially opened,not system or rollback datafile)

> c:\backup\user.dbf c:\oradata\user.dbf (alter tablespace offline)

>recover datafile 'c:\oradata\user.dbf' or

>recover tablespace user_data;

>alter database datafile 'c:\oradata\user.dbf' online or

>alter tablespace user_data online;

--method 3(opened database,initially closed not system or rollback datafile)

>startup mount

>alter database datafile 'c:\oradata\user.dbf' offline;

>alter database open

> c:\backup\user.dbf d:\oradata\user.dbf

>alter database rename file 'c:\oradata\user.dbf' to 'd:\oradata\user.dbf'

>recover datafile 'e:\oradata\user.dbf' or recover tablespace user_data;

>alter tablespace user_data online;

--method 4(loss of data file with no backup and have all archive log)

>alter tablespace user_data offline immediate;

>alter database create datafile 'd:\oradata\user.dbf' as 'c:\oradata\user.dbf''

>recover tablespace user_data;

>alter tablespace user_data online

5.perform an open database backup

> alter tablespace user_data begin backup;

> files /backup/

> alter database datafile '/c:/../data.dbf' end backup;

> alter system switch logfile;

6.backup a control file

> alter database backup controlfile to 'control1.bkp';

> alter database backup controlfile to trace;

7.recovery (noarchivelog mode)

> shutdown abort

> cp files

> startup

8.recovery of file in backup mode

>alter database datafile 2 end backup;

9.clearing redo log file

>alter database clear unarchived logfile group 1;

>alter database clear unarchived logfile group 1 unrecoverable datafile;

10.redo log recovery

>alter database add logfile group 3 'c:\oradata\redo03.log' size 1000k;

>alter database drop logfile group 1;

>alter database open;

or >cp c:\oradata\redo02.log' c:\oradata\redo01.log

>alter database clear logfile 'c:\oradata\log01.log';

⑸ oracle如何將表的歷史數據歸檔

歸檔日誌(ArchiveLog)是非活動的重做日誌備份.通過使用歸檔日誌,可以保留所有重做歷史記錄,當資料庫處於ARCHIVELOG模式並進行日誌切換式,後台進程ARCH會將重做日誌的內容保存到歸檔日誌中.當資料庫出現介質失敗時,使用數據文件備份,歸檔日誌和重做日誌可以完全恢復資料庫.
日誌操作模式:ARCHIVELOGNOARCHIVELOG
1,改變日誌操作模式:
檢查當前日誌操作模式
SELECTlog_modefromv$database;
關閉資料庫,然後裝載資料庫
SHUTDOWNIMMEDIATE
STARTUPMOUNT
改變日誌操作模式,然後打開資料庫
ALTERDATABASEARCHIVELOG;
ALTERDATABASEOPEN;
2,執行手工歸檔
從oracledatabase10g開始,當將日誌操作模式轉變未ARCHIVELOG模式時,oracle會自動啟動ARCH進程.如果要使用手工歸檔.那麼在改變日誌操作模式時必須使用命令ALTERDATABASEARCHIVELOGMANUAL.
需要注意,使用手工歸檔方式,資料庫管理員必須手工執行歸檔命令.如果沒有執行手工歸檔命令,日誌組的原有內容將不能被覆蓋.ALTERDATABASEARCHIVELOGMANUAL命令是為了與先前的版本兼容而保留的,.將來的oracle版本會淘汰該命令,使用手工歸檔方式是,資料庫管理員可以執行以下命令歸檔重做日誌:
SLTERSYSTEMARCHIVELOGALL;
3,配置歸檔進程
初始化參數LOG_ARCHIVE_MAX_PROCESSES用於指定常式初始啟動的最大歸檔進程個數,當將資料庫轉變為ARCHIVELOG模式時,默認情況下oracle會自動啟動兩個歸檔進程.通過改變初始化參數LOG_ARCHIVE_MAX_PROCESS的值,可以動態地增加或降低歸檔進程的個數:
ALTERSYSTEMSETLOG_ARCHIVE_MAX_PROCESSES=3;

配置歸檔位置和文件格式
當資料庫處於ARCHIVELOG模式時,如果進行日誌切換,後台進程將自動生成歸檔日誌,歸檔日誌的默認位置為%oracle_home%rdbms,在oracledatabase10g中,歸檔日誌的默認文件格式為ARC%S_%R.%T.為了改變歸檔日誌的位置和名稱格式,必須改變相應的初始化參數,
1,初始化參數LOG_ARCHIVE_FORMAT用於指定歸檔日誌的文件名格式,設置該初始化參數時,可以指定以下匹配符:
%s:日誌序列號:
%S:日誌序列號(帶有前導0)
%t:重做線程編號.
%T:重做線程編號(帶有前導0)
%a:活動ID號
%d:資料庫ID號
%rRESETLOGS的ID值.
從10g開始,配置歸檔日誌文件格式時,必須帶有%s,%t和%r匹配符,配置了歸檔文件格式後,必須重啟資料庫.
2,使用LOG_ARCHIVE_DEST配置歸檔位置
如果不使用備用資料庫,只需要將歸檔日誌存放到本地目錄.配置本地歸檔位置可以使用初始化參數LOG_ARCHIVE_DEST和LOG_ARCHIVE_DUPLEX_DEST,其中,第一個參數用於設置第一個歸檔位置,第二個參數用於指定第二個歸檔位置.
ALTERSYSTEMSETlog_archive_dest=』d:demoarchive1』;
ALTERSYSTEMSETlog_archive_plex_dest=』d:demoarchive2』;
3,使用LOG_ARCHIVE_DEST_n配置多個歸檔位置.
初始化參數LOG_ARCHIVE_DEST_n用於指定多個歸檔位置,該參數最多可以指定10個歸檔位置.通過使用初始化參數LOG_ARCHIVE_DEST_n,不僅可以配置本地歸檔位置,還可以配置遠程歸檔位置.
如果既要在主節點上生成歸檔日誌,又要將歸檔日誌傳遞到備用節點,那麼必須使用參數LOG_ARCHIVE_DEST_n.該參數與LOG_ARCHIVE_DEST具有如下區別;
初始化參數LOG_ARCHIVE_DEST_n可以配置本地歸檔位置和遠程歸檔位置,而初始化參數LOG_ARCHIVE_DEST和LOG_ARCHIVE_DUPLEX_DEST只能配置本地歸檔位置.
初始化參數LOG_ARCHIVE_DEST_n可以配置多達10個歸檔位置,而初始化參數LOG_ARCHIVE_DEST和LOG_ARCHIVE_DUPLEX_DEST最多隻能配置兩個歸檔位置.
初始化參數LOG_ARCHIVE_DEST_n不能與初始化參數LOG_ARCHIVE_DEST和LOG_ARCHIVE_DUPLEX_DEST同時使用.
因為初始化參數LOG_ARCHIVE_DEST_n不能與初始化參數LOG_ARCHIVE_DEST和LOG_ARCHIVE_DUPLEX_DEST同時使用,所以必須禁用初始化參數LOG_ARCHVE_DEST和LOG_ARCHIVE_DUPLEX_DEST.當使用初始化參數LOG_ARCHIVE_DEST_n配置本地歸檔位置時,需要指定LOCALTION選項.當配置遠程歸檔位置時,需要指定SERVICE選項.
示例如下:
ALTERSYSTEMSETlog_archive_plex_dest=』』;
ALTERSYSTEMSETlog_archive_dest=』』;
ALTERSYSTEMSETlog_archive_dest_1=』location=d:demoarchive1』;
ALTERSYSTEMSETlog_archive_dest_2=』location=d:demoarchive2』;
ALTERSYSTEMSETlog_archive_dest_3=』location=d:demoarchive3』;
ALTERSYSTEMSETlog_archive_dest_4=』service=standby』;
配置遠程歸檔位置時,SERVICE選項需要指定遠程資料庫的網路服務名(在tnsnames.ora文件中配置)
4,使用LOG_ARCHIVE_DEST_n選項
使用初始化參數LOG_ARCHIVE_DEST_n配置歸檔位置時,可以在歸檔位置上指定OPTIONAL或MANDATORY選項.指定MANDATORY選項時,可以設置REOPEN屬性.
OPTIONAL:該選項是默認選項.使用該選項時,無論歸檔是否成功,都可以覆蓋重做日誌.
MANDATORY:強制歸檔.使用該選項時,只有在歸檔成功之後,重做日誌才能被覆蓋.
REOPEN:該屬性用於指定重新歸檔的時間間隔,默認值為300秒,必須跟在MANDATORY後.
例:
Altersystemsetlog_archive_dest_1=』location=d:demoarchive1mandatory』;
Altersystemsetlog_archive_dest_2=』location=d:demoarchive2mandatoryreopen=500』;
Altersystemsetlog_archive_dest_3=』location=d:demoarchive3optional』;
5,控制本地歸檔成功的最小個數.
使用初始化參數LOG_ARCHIVE_MIN_SUCCEED_DEST控制本地歸檔的最小成功個數
Altersystemsetlog_archive_min_succeed_dest=2;
6,使用初始化參數LOG_ARCHIVE_DEST_STATE_n控制歸檔位置的可用性.設置該參數為ENABLE(默認值),表示會激活相應的歸檔位置;設置該參數為DEFER,表示禁用相應歸檔位置.當歸檔日誌所在磁碟損壞或填滿時,DBA需要暫時禁用該歸檔位置.
Altersystemsetlog_archive_dest_state_3=defer;(禁用)
Altersystemsetlog_archive_dest_state_3=enable;(啟用)

顯示歸檔日誌信息
1,使用ARCHIVELOGLIST命令可以顯示日誌操作模式,歸檔位置,自動歸檔機器要歸檔的日誌序列號等信息.
2顯示日誌操作模式
SELECTname,log_modeFROMv$database;
3,顯示歸檔日誌信息.
Colnameformata40
Selectname,swquence#,first_change#FROMv$archived_log;
Name用於表示歸檔日誌文件名,sequence#用於表示歸檔日誌對應的日誌序列號,firs_change#用於標識歸檔日誌的起始SCN值.
4執行介質恢復時,需要使用歸檔日誌文件,此四必須准確定位歸檔日誌的存放位置.通過查詢動態性能視圖v$archive_dest可以取得歸檔日誌所在目錄.
SELECTdestinationFROMv$archivedest;
5,顯示日誌歷史信息
SELECT*FROMv$loghist;
THREAD#用於標識重做線程號,SEQUNCE#用於標識日誌序列號,FIRST_CHANGE#用於標識日誌序列號對應的起始SCN值,FIRST_TIME用於標識起始SCN的發生時間.SWICTH_CHANGE#用於標識日誌切換的SCN值.
6.顯示歸檔進程信息.
進行日誌切換時,ARCH進程會自動將重做日誌內容復制到歸檔日誌中,為了加快歸檔速度,應該啟用多個ARCH進程.通過查詢動態性能視圖V$ARCHIVE_PROCESSES可以顯示所有歸檔進程的信息!
SELECT*FROMv$archive_processes;
Porcess用於標識ARCH進程的編號,status用於標識ARCH進程的狀態(ACTIVE:活動,STOPPED:未啟動),log_sequence用於標識正在進行歸檔的日誌序列號,state用於標識ARCH進程的工作狀態

⑹ win7下開啟ORACLE服務命令

操作方法如下：

1、按win+r，輸入net start OracleServiceORCL，點擊確定；

⑺ oracle命令

select * from a where b>10000;

⑻ Oracle 命令

再有值的情況下不能直接修改欄位屬性
但是可以通過其他辦法得到
舉個例子
1.先增加一個欄位 alter table table_name add fieldname_C int;
2.更新改欄位為你要的
update table_name set fieldname_C=to_number(fieldname_A)+50 where 日期條件;
commit;
3.刪除A欄位
alter table table_name drop column ....
4.更新C欄位名字為A欄位
alter table table_name rename column C to A;

⑼ oracle基本命令

1.用戶有哪些表空間概念錯了,只能看用戶用了哪些user_tablespaces視圖就可以
select tablespace_name from dba_tablespaces;
2.變數填自己的
select owner,table_name from dba_tables where tablespace_name='SYSTEM';
select tablespace_name from dba_tables where table_name='EMP';