查询oracle中所有用户信息(转) [数据库教程]
----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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