• linux权限

  1. r 读
  2. w 写
  3. x 执行

• linu用户

  1. 所有者(u)
  2. 所属组(g)
  3. 其他用户(o)

-rw-r--r--. 1 root root  215 Dec  2 20:16 abc.txt

用户、组、权限分配

1. 用户管理
   useradd rick
   userdel rick
   passwd rick

2. 用户组
   groupadd xhope
   groupdel xhope
   gpasswd -a rick xhope

3. 权限分配
   chmod 755 test.java
   chmod g+w test.java
   chmod o-w test.java
   chmod a+w test.java

   acl权限分配

   [root@localhost common]# setfacl -m u:tmpuser:rw test.py
   [tmpuser@localhost common]$ getfacl test.py
   # file: test.py
   # owner: rick
   # group: xhope
   user::r-x
   user:tmpuser:rw-
   group::--x
   mask::rwx
   other::--x
   [root@localhost common]# setfacl -m g:xhope:rw test.py
   [root@localhost common]# setfacl -x u:tmpuser test.py
   [root@localhost common]# setfacl -b test.py
   [root@localhost common]# getfacl test.py
   # file: test.py
   # owner: rick
   # group: xhope
   user::r-x
   group::--x
   other::--x
   

PL/SQL Developer客户端连接Oracle服务器

1. 下载PL/SQL Developer 最新版本Version 11.0.2.1766
2. 下载instantclient注意Oracle是32位或者64位
   a. instantclient-basic-win32-11.2.0.1.0.zip
   b. instantclient-basic-win-x86-64-11.2.0.1.0.zip

3. 配置：
   a. 解压对应的版本到D:\develop\instantclient_11_2
   b. 双击plsqldev.exe,开始设置Oracle Home & OCI library

       Oracle Home:D:\develop\instantclient_11_2
       OCI library:D:\develop\instantclient_11_2\oci.dll
   

4. 登录对话框
   e.g.

       Username:aswdspc_my
       Password:aswdspc_my
       Database:10.32.186.133:1503/aswdspc
   

0表空间

SQL>select username,default_tablespace from user_users;

查看当前用户的角色

SQL>select * from user_role_privs;

查看当前用户的系统权限和表级权限

SQL>select * from user_sys_privs;SQL>select * from user_tab_privs;

查看用户下所有的表

SQL>select * from user_tables;

1、用户查看当前用户的缺省表空间

SQL>select username,default_tablespace from user_users;

查看当前用户的角色

SQL>select * from user_role_privs;

查看当前用户的系统权限和表级权限

SQL>select * from user_sys_privs;
SQL>select * from user_tab_privs;

显示当前会话所具有的权限

SQL>select * from session_privs;

显示指定用户所具有的系统权限

SQL>select * from dba_sys_privs where grantee='GAME';

2、表查看用户下所有的表

SQL>select * from user_tables;

查看名称包含log字符的表

SQL>select object_name,object_id from user_objectswhere instr(object_name,'LOG')>0;

查看某表的创建时间

SQL>select object_name,created from user_objects where object_name=upper('&table_name');

查看某表的大小

SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segmentswhere segment_name=upper('&table_name');

查看放在ORACLE的内存区里的表

SQL>select table_name,cache from user_tables where instr(cache,'Y')>0;

　3、索引查看索引个数和类别

SQL>select index_name,index_type,table_name from user_indexes order by table_name;

查看索引被索引的字段

SQL>select * from user_ind_columns where index_name=upper('&index_name');

查看索引的大小

SQL>select sum(bytes)/(1024*1024) as "size(M)" from user_segmentswhere segment_name=upper('&index_name');

4、序列号查看序列号，last_number是当前值

SQL>select * from user_sequences;

5、视图
查看视图的名称

SQL>select view_name from user_views;

查看创建视图的select语句

SQL>set view_name,text_length from user_views;
SQL>set long 2000;

说明：可以根据视图的text_length值设定set long 的大小

SQL>select text from user_views where view_name=upper('&view_name');

6、同义词查看同义词的名称

SQL>select * from user_synonyms;

7、约束条件
查看某表的约束条件

SQL>select constraint_name, constraint_type,search_condition, r_constraint_namefrom user_constraints where table_name = upper('&table_name');
SQL>select c.constraint_name,c.constraint_type,cc.column_name from  user_constraints c,user_cons_columns ccwhere c.owner = upper('&table_owner') and c.table_name = upper('&table_name')and c.owner = cc.owner and c.constraint_name = cc.constraint_nameorder by cc.position;

8、存储函数和过程查看函数和过程的状态

SQL>select object_name,status from user_objects where object_type='FUNCTION';
SQL>select object_name,status from user_objects where object_type='PROCEDURE';

查看函数和过程的源代码

SQL>select text from all_source where owner=user and name=upper('&plsql_name');