oracle数据库删除用户（schema）操作

先关闭应用

1）查看用户的默认表空间及临时表空间

set lines 300

col username for a30

select username ,default_tablespace,TEMPORARY_TABLESPACE from dba_users where username='MESPRD';

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

USERNAME   DEFAULT_TABLESPACE     TEMPORAR    Y_TABLESPACE

MESPRD    HTTBS_MESPRD                        TEMP

2)查看该用户的权限和角色

   select privilege from dba_sys_privs where grantee='SYSADM'

uNIOn

select privilege from dba_sys_privs where grantee in (select granted_role from dba_role_privs where grantee='MESPRD' );

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

PRIVILEGE

CREATE CLUSTER

CREATE INDEXTYPE

CREATE OPERATOR

CREATE PROCEDURE

CREATE SEQUENCE

CREATE SESSioN

CREATE TABLE

CREATE TRIGGER

CREATE TYPE

已选择9行。

3)获取获得授予用户权限的脚本

select 'grant '||privilege||' to SYSADM;' from (select privilege from dba_sys_privs where grantee='SYSADM'

union

select privilege from dba_sys_privs where grantee in (select granted_role from dba_role_privs where grantee='SYSADM' ));

4）执行脚本获得删除该schema下对象的脚本  mesprd为要删除的schema

connect mesprd/MESPRD

spool E:\app\Administrator\del_mesprd.sql;  

select 'alter table '||table_name||' drop constraint '||constraint_name||' ;' from user_constraints where constraint_type='R';

select 'truncate table '||table_name ||';' from user_tables; 

select 'drop table '||table_name ||' purge;' from user_tables;  

select 'drop index '||index_name ||';' from user_indexes;  

select 'drop view ' ||view_name||';' from user_views;

select 'drop sequence ' ||sequence_name||';' from user_sequences;  

select 'drop function ' ||object_name||';'  from user_objects  where object_type='FUNCTION';

select 'drop procedure '||object_name||';' from user_objects  where object_type='PROCEDURE';

select 'drop package '|| object_name||';' from user_objects  where object_type='PACKAGE';

select 'drop database link '|| object_name||';' from user_objects  where object_type='DATABASE LINK';    

spool off;

5）sqlplus连接到该schema下，执行如上获得的脚本

  执行前查看下该schema下的对象，执行后再次查看下该schema下的对象

@？\E:\app\Administrator\del_mesprd.sql; 

  SQL> select object_type,count(*) from user_objects group by object_type;

 6）kill掉连接数据库的session

  select 'alter system kill session '''||sid||','||serial#||''' immediate;' from v$session where username='MESPRD';

7）删除该schema

  drop user MESPRD cascade;