查询oracle中所有用户信息(转) [数据库教程]

database

----查询oracle中所有用户信息

----1、查询数据库中的表空间名称

----1)查询所有表空间

select tablespace_name from dba_tablespaces;

select tablespace_name from user_tablespaces;

----2)查询使用过的表空间

select distinct tablespace_name from dba_all_tables;

select distinct tablespace_name from user_all_tables;

----2、查询表空间中所有表的名称

select * from dba_all_tables where tablespace_name = ‘SYNC_PLUS_1‘ and owner=‘GDSDCZJ‘

----3、查询系统用户

select * from all_users

select * from dba_users

----4、查看当前连接用户

select * from v$session

----5、查看当前用户权限

select * from session_privs

----6、查看所有的函数和存储过程

select * from user_source

----其中TYPE包括:PROCEDURE、FUNCTION

----7、查看表空间使用情况

select sum(Bytes_size) from (

select a.file_id "FileNo",

a.tablespace_name "表空间",

a.bytes/1024/1021/1024 Bytes_size,

a.bytes - sum(nvl(b.bytes, 0)) "已用",

sum(nvl(b.bytes, 0)) "空闲",

sum(nvl(b.bytes, 0)) / a.bytes * 100 "空闲百分率"

from dba_data_files a, dba_free_space b

where a.file_id = b.file_id(+)

group by a.tablespace_name, a.file_id, a.bytes

order by a.tablespace_name

);

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

----1.查看所有用户:

select * from dba_users;

select * from all_users;

select * from user_users;

----2.查看用户或角色系统权限(直接赋值给用户或角色的系统权限):

select * from dba_sys_privs;

select * from user_sys_privs; (查看当前用户所拥有的权限)

----3.查看角色(只能查看登陆用户拥有的角色)所包含的权限

sql>select * from role_sys_privs;

----4.查看用户对象权限:

select * from dba_tab_privs;

select * from all_tab_privs;

select * from user_tab_privs;

----5.查看所有角色:

select * from dba_roles;

----6.查看用户或角色所拥有的角色:

select * from dba_role_privs;

select * from user_role_privs;

----7.查看哪些用户有sysdba或sysoper系统权限(查询时需要相应权限)

select * from V$PWFILE_USERS

----8.SqlPlus中查看一个用户所拥有权限

SQL>select * from dba_sys_privs where grantee=‘username‘;

其中的username即用户名要大写才行。

比如:

SQL>select * from dba_sys_privs where grantee=‘TOM‘;

----9、Oracle删除指定用户所有表的方法

select ‘Drop table ‘||table_name||‘;‘ from all_tables

where owner=‘要删除的用户名(注意要大写)‘;

----10、删除用户

drop user user_name cascade;

如:drop user SMCHANNEL CASCADE

----11、获取当前用户下所有的表:

select table_name from user_tables;

----12、删除某用户下所有的表数据:

select ‘truncate table ‘ || table_name from user_tables;

----13、禁止外键

----ORACLE数据库中的外键约束名都在表user_constraints中可以查到。其中constraint_type=‘R‘表示是外键约束。

----启用外键约束的命令为:

alter table table_name enable constraint constraint_name

----禁用外键约束的命令为:

alter table table_name disable constraint constraint_name

----然后再用SQL查出数据库中所以外键的约束名:

select ‘alter table ‘||table_name||‘ enable constraint ‘||constraint_name||‘;‘ from user_constraints where constraint_type=‘R‘

select ‘alter table ‘||table_name||‘ disable constraint ‘||constraint_name||‘;‘ from user_constraints where constraint_type=‘R‘

--14、ORACLE禁用/启用外键和触发器

--启用脚本

SET SERVEROUTPUT ON SIZE 1000000

BEGIN

for c in (select ‘ALTER TABLE ‘||TABLE_NAME||‘ ENABLE CONSTRAINT ‘||constraint_name||‘ ‘ as v_sql from user_constraints where CONSTRAINT_TYPE=‘R‘) loop

DBMS_OUTPUT.PUT_LINE(C.V_SQL);

begin

EXECUTE IMMEDIATE c.v_sql;

exception when others then

dbms_output.put_line(sqlerrm);

end;

end loop;

for c in (select ‘ALTER TABLE ‘||TNAME||‘ ENABLE ALL TRIGGERS ‘ AS v_sql from tab where tabtype=‘TABLE‘) loop

dbms_output.put_line(c.v_sql);

begin

execute immediate c.v_sql;

exception when others then

dbms_output.put_line(sqlerrm);

end;

end loop;

end;

/

commit;

--禁用脚本

SET SERVEROUTPUT ON SIZE 1000000

BEGIN

for c in (select ‘ALTER TABLE ‘||TABLE_NAME||‘ DISABLE CONSTRAINT ‘||constraint_name||‘ ‘ as v_sql from user_constraints where CONSTRAINT_TYPE=‘R‘) loop

DBMS_OUTPUT.PUT_LINE(C.V_SQL);

begin

EXECUTE IMMEDIATE c.v_sql;

exception when others then

dbms_output.put_line(sqlerrm);

end;

end loop;

for c in (select ‘ALTER TABLE ‘||TNAME||‘ DISABLE ALL TRIGGERS ‘ AS v_sql from tab where tabtype=‘TABLE‘) loop

dbms_output.put_line(c.v_sql);

begin

execute immediate c.v_sql;

exception when others then

dbms_output.put_line(sqlerrm);

end;

end loop;

end;

/

commit;

转自 https://www.cnblogs.com/ios9/p/9100185.html

查询oracle中所有用户信息(转)

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