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;
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
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'''';
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