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查询oracl用户信息

--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;

 

查询oracl用户信息