ORACLE下删除当前用户下所有对象的SQL

ORACLE下删除当前用户下所有对象的SQL，这个是转别人的，但是，做了修改和注释

Sql代码

--删除某个用户下的对象

set heading off;

set feedback off;

spool c:\dropobj.sql;

prompt --Drop constraint

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

prompt --Drop tables

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

prompt --Drop view

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

prompt --Drop sequence

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

prompt --Drop function

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

prompt --Drop procedure

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

prompt --Drop package

prompt --Drop package body

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

prompt --Drop database link

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

spool off;

set heading on;

set feedback on;

@@c:\dropobj.sql;

host del c:\dropobj.sql;

--删除某个用户下的对象
set heading off;
set feedback off;
spool c:\dropobj.sql;
prompt --Drop constraint
select 'alter table '||table_name||' drop constraint '||constraint_name||' ;' from user_constraints where constraint_type='R';
prompt --Drop tables
select 'drop table '||table_name ||';' from user_tables;

prompt --Drop view
select 'drop view ' ||view_name||';' from user_views;

prompt --Drop sequence
select 'drop sequence ' ||sequence_name||';' from user_sequences;

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

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

prompt --Drop package
prompt --Drop package body
select 'drop package '|| object_name||';' from user_objects  where object_type='PACKAGE';

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

spool off;
set heading on;
set feedback on;

@@c:\dropobj.sql;
host del c:\dropobj.sql;

注释：

1.上面这个语句，在pl/sql里面是放在命令里面执行的。

2.set heading off; 意思就是关闭表头。如果不关闭，写入dropobj.sql文件中就会带有结果集的表头如：

'DROPTABLE'||TABLE_NAME||';'

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

drop table TEACHER;

实际上我们需要的是“drop table TEACHER;”，“'DROPTABLE'||TABLE_NAME||';'

”就是表头。

3.set feedback off; 意思就是关闭回显。如果不关闭，写入dropobj.sql文件中就会带有返回结果集的大小等信息，如："137 rows selected"

4.spool c:\dropobj.sql; 把结果集写入这个文件。spool off; 结束写入。

5.@@c:\dropobj.sql; 执行这个sql

6.host del c:\dropobj.sql; 删除主机上这文件。

7.CONSTRAINT_TYPE 就是键的类型：

Sql代码

C (check constraint on a table)

P (primary key)

U (unique key)

R (referential integrity)

V (with check option, on a view)

O (with read only, on a view)

C (check constraint on a table)
P (primary key)
U (unique key)
R (referential integrity)
V (with check option, on a view)
O (with read only, on a view)

8.当执行'drop package ………… '这句时，package body会被同时删除。