本教程操作环境：Windows10系统、Oracle 11g版、Dell G3电脑。

oracle怎么删除schema

删除schema语法如下：

ｄｒｏｐ user username cascade;

示例如下：

1)查看用户的默认表空间及临时表空间

set lines 300col username for a30select username ,default_tablespace,TempORARY_TABLESPACE from dba_users where username='MESPRD';-----------------------------------USERNAME   DEFAULT_TABLESPACE     TEMPORAR    Y_TABLESPACEMESPRD    HTTBS_MESPRD                        TEMP

2)查看该用户的权限和角色

ｓｅｌｅｃｔ privilege from dba_sys_privs where grantee='SYSADM'unionselect privilege from dba_sys_privs where grantee in (ｓｅｌｅｃｔ granted_role from dba_role_privs where grantee='MESPRD' );-----------------------------------PRIVILEGECREATE CLUSTERCREATE INDEXTYPECREATE OPERATORCREATE PROCEDURECREATE SEQUENCECREATE SESSIONCREATE TABLECREATE TRIGGERCREATE 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'unionselect 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/MESPRDspool 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;

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