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。
成都創(chuàng)新互聯(lián)公司專注于江海企業(yè)網(wǎng)站建設,自適應網(wǎng)站建設,電子商務商城網(wǎng)站建設。江海網(wǎng)站建設公司,為江海等地區(qū)提供建站服務。全流程按需定制,專業(yè)設計,全程項目跟蹤,成都創(chuàng)新互聯(lián)公司專業(yè)和態(tài)度為您提供的服務
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
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。
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';
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]
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';
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