Common Oracle statements

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oracle practice

1. How to query the permissions included in a role

   a. System permissions contained in a role

   select * from dba_sys_privs where  grantee='DBA';

   b. The object permissions contained in a role

 2.oracle How many roles are there

  ( Inquire about oracle All the characters in , It's usually dba)  

   select * from dba_roles;

 3. Inquire about oracle All system permissions in , It's usually dba

  select * from system_privilege_map order by name;

 4. Inquire about oracle All object permissions in , It's usually dba

   select distinct privilege from dba_tab_privs;

    Be careful ： If you don't write here distinct Words , It's easy to crash

 5. Query the table space of the database

   select tablespace_name from dba_tablespaces;

 6. Query what role a user has

   select * from dba_role_privs where grantee=' user name ';

 7. Query which system permissions a role includes

  select * from dba_sys_privs where grantee='DBA';

  perhaps ：

  select * from role_sys_privs where role='DBA';

 8. Query the object permissions included in a role

  select * from dba_tab_privs where grantee=' The role of ';

practice oracle Import and export

First step ：

  When importing and exporting , Need to go to oracle The directory bin Under the table of contents

  First find exp.exe The catalog of ：E:\oracle\product\10.2.0\db_1\BIN

  function cmd Access control

 E: enter

 cd E:\oracle\product\10.2.0\db_1\BIN enter

 ------------------------------------------

The second step ：

export

Export table

To export this user's table , be ：

exp userid=scott/[email protected] tables=(emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp enter

The structure of the exported table

   exp userid=scott/[email protected] tables=(emp) file=d:\emp3.dmp rows=n

  

Use direct export

   exp userid=scott/[email protected] tables=(emp) file=d:\e3.dmp direct=y

To export other users' tables , be ：

exp userid=system/[email protected] tables=(scott.emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp enter

Export scheme

To export the scheme of this user , be ：

exp userid=scott/[email protected] owner=scott file=e:\Oracle Information \LearnOracleByMyself\scott.dmp

To export other users' schemes , be ：

exp userid=system/[email protected] tables=(scott.emp) file=e:\Oracle Information \LearnOracleByMyself\scott2.dmp enter

Export database

exp userid=system/[email protected] full=y inctype=complete file=e:\Oracle Information \LearnOracleByMyself\orcl.dmp

Import

The import table

To import this user's table , be ：

imp userid=scott/[email protected] tables=(emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp

To import tables to other users , be ：

imp userid=system/[email protected] tables=(emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp touser=scott

If you just want to import the structure of the table without importing data , be ：

imp userid=scott/[email protected] tables=(emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp rows=n

If you import data to an existing table , be ：

imp userid=scott/[email protected] tables=(emp) file=e:\Oracle Information \LearnOracleByMyself\emp.dmp ignore=y

Import scheme

To import your own scheme , be ：

imp userid=scott/[email protected] file=e:\Oracle Information \LearnOracleByMyself\emp.dmp

To import other schemes , The user is required to have dba Or imp_full_database

imp userid=system/[email protected] file=e:\Oracle Information \LearnOracleByMyself\emp.dmp touser=scott

Import database

By default , When importing a database , All object structures and data will be imported , The case is as follows ：

   imp userid=system/[email protected] full=y file=d:\xx.dmp