ORACE commonly used SQL

ORACE commonly used SQL

1. Create and delete users

  create user tkzj_data identified by 123456 default tablespace data;

  drop user tkzj_data cascade;

2. Change the password

  ALTER user username  identified by 123456

3. Assign roles

  grant resource, connect,create view to username;

  --Create serial authorization

  grant connect,resource,create any view,create any synonym,create database link to tkzj_data;

  grant dba to tkzj_data ;--authorize dba permissions

  revoke dba from username;--Revoke dba permissions

  revoke resource, connect,create view from username;

4. Unlock users

 alter user username account unlock;

4. Hierarchical query

  4.1 Query all leaf nodes according to the root node

  4.2 Query all root nodes according to leaf nodes

  4.3 Query all descendant nodes according to the node

5. The use of advanced sql statement exists

6. Data synchronization statement minus

7. Import/Export database

   imp tkzj_user/123456@orcl file=e:\tkzj.dmp full=y;

  exp tkzj_data2/123456@orcl file=e:\tkzj2.dmp full=y; 

8. Create a tablespace

 create tablespace DATA datafile 'C:\personal\oracle\product\11.2.0\ORADATA\ORCL\DATA01.DBF' size 1024m;