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如何記住oracle命令 oracle幫助命令

初學Oracle,有幾個命令行的菜鳥問題

oracle 10g沒有像9i那樣自帶獨立的管理程序,10g的管理程序是web頁面的,在你安裝的過程中會顯示訪問鏈接的,貌似你沒有記住。現(xiàn)在你可以去下載一個PLSQL Developer軟件來連接你的oracle數(shù)據(jù)庫,它可以滿足你的管理要求,而且比sql*plus好用。

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至于你上面報的錯誤,你可以先檢查你的“服務”里的OracleOraDb10g_homeTNSListener

OracleServiceORCL

這兩個服務是否已經(jīng)在已啟動狀態(tài),另外檢查你的oracle安裝目錄下的tns配置是否正確。

最后告訴你兩個命令

cmd -- sqlplus --在彈出的命令窗口輸入 username/password@SID

開始安裝oracle數(shù)據(jù)庫口令是什么

1·在oracle官網(wǎng)上下載oracle數(shù)據(jù)庫,以Oracle Database 11g?Release 2版本的oracle數(shù)據(jù)庫為例,其他版本的安裝也大同小異。注意,下載前得Accept?License Agreement.

2·下載并解壓文件,找到setup.exe,雙擊進行安裝。與一般軟件安裝一樣,一路next,接收許可協(xié)議中的條款,注意可以自定義安裝路徑。安裝過程中需要設置管理員用戶sys/system的口令密碼(記住這個密碼),通過管理員用戶可以創(chuàng)建普通用戶,輸入密碼后繼續(xù)安裝,這里要注意oracle數(shù)據(jù)庫的監(jiān)聽器程序端口是1521。

3·安裝成功后,每當windows啟動的時候,oracle服務器跟監(jiān)聽器就會自動啟動,不常用數(shù)據(jù)庫時,可以將oracle服務設置為手動啟動模式。設置方法為右擊計算機進入管理系統(tǒng),進入服務和應用程序中的服務界面,找到oracle數(shù)據(jù)庫的四個服務器,其中有兩個正在運行,先停止這兩個服務器,然后在屬性中的啟動類型中設置成手動模式。

4·通過SQL命令鏈接數(shù)據(jù)庫:在開始菜單中的所有應用中找到oracle database,進入運行SQL命令行,在SQL命令行中輸入conn system,會提示你輸入口令,輸入在安裝過程中設置的口令即可鏈接成功。

4·通過windows自帶的命令行鏈接數(shù)據(jù)庫:找到運行(win+R),輸入cmd進入cmd命令輸入界面,輸入sqlplus,然后輸入管理員用戶名(system)和口令密碼即可鏈接成功。

5·通過windows自帶的命令行鏈接數(shù)據(jù)庫:找到運行(win+R),輸入cmd進入cmd命令輸入界面,輸入sqlplus “/as sysdba”即可鏈接成功。

干貨-Oracle里的常用命令

本文轉(zhuǎn)自:51Testing軟件測試網(wǎng)。()

? 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:\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.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: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(shù)據(jù)

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

sqlalter 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 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

sqlpassword_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)

copy 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)

copy 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

copy 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;

copy 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';

oracle快捷鍵都有哪些啊?

你問的是不是PL/SQL啊?

plsql工具技巧

1、PL/SQL Developer記住登陸密碼 在使用PL/SQL Developer時,為了工作方便希望PL/SQL Developer記住登錄Oracle的用戶名和密碼; 設置方法:PL/SQL Developer 7.1.2 -tools-Preferences-Oracle-Logon History , “Store history”是默認勾選的,勾上“Store with password” 即可,重新登錄在輸入一次密碼則記住了。

2、執(zhí)行單條SQL語句 在使用PL/SQL Developer的SQL Window時,按F8鍵,PL/SQL Developer默認是執(zhí)行該窗口的所有SQL語句,需要設置為鼠標所在的那條SQL語句,即執(zhí)行當前SQL語句; 設置方法:PL/SQL Developer 7.1.2 --tools-Preferences--Window types ,勾上“AutoSelect Statement” 即可。

3、格式化SQL語句 在使用PL/SQL Developer的SQL Window時,有時候輸入的SQL語句太長或太亂,希望能用比較通用的寫法格式話一下,這樣看起來會好看些,也好分析; 使用方法:選中需要格式化的SQL語句,然后點擊工具欄的PL/SQL beautifier按鈕即可.

4、查看執(zhí)行計劃 在使用PL/SQL Developer的SQL Window時,有時候輸入的SQL語句執(zhí)行的效率,分析下表結(jié)構(gòu),如何可以提高查詢的效率,可以通過查看Oracle提供的執(zhí)行計劃; 使用方法:選中需要分析的SQL語句,然后點擊工具欄的Explain plan按鈕(即執(zhí)行計劃),或者直接按F5即可。

5、調(diào)試存儲過程 在使用PL/SQL Developer操作Oracle時,有時候調(diào)用某些存儲過程,或者調(diào)試存儲過程; 調(diào)用存儲過程的方法:首先,在PL/SQL Developer左邊的Browser中選擇Procedures,查找需要調(diào)用的存儲過程;然后,選中調(diào)試的存儲過程,點擊右鍵,選擇Test,在彈出來的Test scrīpt窗口中,對于定義為in類型的參數(shù),需要給該參數(shù)的Value輸入值;最后點擊上面的條數(shù)按鈕:Start debugger 或者按F9;最后點擊:RUN 或者Ctrl+R。

6、auto select auto execute Tools-Preferences-SQL Window,將 AutoExecute queries 和 AutoSelect statement 這兩項選中即可。只要啟用了這個功能之后,按F8(對應“執(zhí)行”的快捷鍵),就可以執(zhí)行光標所在SQL語句了,而不再需要先用鼠標選取需要執(zhí)行的語句了。

7、關(guān)鍵字自動大寫 Tools-Preferences-Editor,將Keyword case選擇Uppercase。一般是讓關(guān)鍵字大寫,其他比如表名、字段名等都是小寫。大家都應該養(yǎng)成一種自己的編碼習慣,并保持下去。

8、更改默認執(zhí)行得快捷鍵F8為Ctrl+Enter(類同toad) Tools-Preferences-Key Configuration-Session/Execute,然后按Ctrl+Enter。

9、保存登陸密碼 Tools-Preferences-Logon History-選上Store with Password。 10、AutoReplace自動替換功能 Tools-Preferences-Editor-AutoReplace-選上Enabled,并Edit文件,加入以下內(nèi)容: sf=select * from scf=select count(*) from s=select f=from w=where d=delete u=update --End--[/size]

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.變量填自己的

select owner,table_name from dba_tables where tablespace_name='SYSTEM';

select tablespace_name from dba_tables where table_name='EMP';

oracle常用命令大全

學習時整理的 Oracle 1、set linesize 100; 設置長度

2、set pagesize 30; 設置每頁顯示數(shù)目

3、em a.sql 打開記事本

4、@ a 執(zhí)行文件a中的代碼,可指定文件的路徑 @d:a.txt

5、conn 用戶名/密碼 根據(jù)用戶名和密碼連接數(shù)據(jù)庫 如果連接超級管理員(sys) 則應加上as sysdba;

6、show user; 顯示當前連接的用戶

7、select * from tab; 得到當前用戶下的所有表

8、desc temp; 查看表結(jié)構(gòu)

9、/ 繼續(xù)執(zhí)行上一個查詢語句

clear scr; 清屏字符函數(shù)

10、select upper('coolszy') from dual; 將小寫字母轉(zhuǎn)換成大寫,dual 為一虛表

11、select lower('KUKA') from dual; 將大寫字母轉(zhuǎn)換成小寫

12、select initcap('kuka') from dual; 將首字母大寫

13、select concat('Hello',' world') from dual; 連接字符串,但沒有||好用select concat('Hello','world') from dual;

14、select substr('hello',1,3) from dual; 截取字符串

15、select length('hello') from dual; 求字符串長度

16、select replace('hello','l','x') from dual; 替換字符串

17、select substr('hello',-3,3) from dual; 截取后三位數(shù)值函數(shù)

18、select round(789.536) from dual; 四舍五入,舍去小數(shù)

19、select round(789.536,2) from dual; 保留兩位小數(shù)

20、select round(789.536,-1) from dual; 對整數(shù)進行四舍五入

21、select trunc(789.536) from dual; 舍去小數(shù),但不進位

22、select trunc(789.536,2) from dual;

23、select trunc(789.536,-2) from dual;

24、select mod(10,3) from dual; 返回10%3的結(jié)果日期函數(shù)

25、select sysdate from dual; 返回當前日期

26、select months_between(sysdate,'16-6月 -08') from dual; 返回之間的月數(shù)

27、select add_months(sysdate,4) from dual; 在日期上加上月數(shù)

28、select next_day(sysdate,'星期一') from dual; 求下一個星期一

29、select last_day(sysdate) from dual; 求本月的最后一天

轉(zhuǎn)換函數(shù)

30、select to_char(sysdate,'yyyy') year,to_char(sysdate,'mm'),to_char(sysdate,'dd') from dual;

31、select to_char(sysdate,'yyyy-mm-dd') from dual;

32、select to_char(sysdate,'fmyyyy-mm-dd') from dual; 取消月 日 前面的0

33、select to_char('20394','99,999') from dual; 分割錢 9表示格式

34、select to_char('2034','L99,999') from dual; 加上錢幣符號

35、select to_number('123')*to_number('2') from dual;

36、select to_date('1988-07-04','yyyy-mm-dd') from dual; 通用函數(shù)

37、select nvl(null,0) from dual; 如果為null,則用0代替

38、select decode(1,1,'內(nèi)容是1',2,'內(nèi)容是2',3,'內(nèi)容是3') from dual; 類似于 switch...case...事務處理

39、commit; 提交事務

40、rollback; 回滾事務

41、select rownum from table; 在沒一列前面顯示行號

42、drop table 表名 cascade constraint

on delete casecade 當父表中的內(nèi)容被刪除后,子表中的內(nèi)容也被刪除43、desc表名 顯示表的結(jié)構(gòu)

44、create user [username] identified by [password] 創(chuàng)建新的用戶

45、grant 權(quán)限1、權(quán)限2...to 用戶 給創(chuàng)建用戶權(quán)限

ex:grant create session to [username] 此時只能連接到數(shù)據(jù)庫

grant connect,resource to [username] 此時權(quán)限能滿足要求

46、alter user [username] identified by [password] 修改用戶密碼

47、alter user [username] password expired 下次登錄時提示修改密碼

48、alter user [username] account lock 鎖住用戶

49、alter user [username] account unlock 解鎖鎖用戶

50、grant select,delete on scott.emp to [username] 把scott下emp表的兩個權(quán)限給用戶

51、revoke select ,delete on scott.emo from [username] 回收權(quán)限


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