查询oracle中所有用户信息 禁用用户
----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;
启用:alter user 【username】 account unlock
禁用:alert user 【username】 account lock
注意:启用已禁用的账户后,要设置密码。
【实例】
启用scott用户:
- alter user scott account unlock
设置密码位tiger:
- alter user scott identified by tiger