Oracle drop user xxx cascade

drop user； 仅仅是删除用户，

drop user××cascade；会删除此用户名下的所有表和视图。

user
Specify theuserto be dropped. Oracle Database does notdropusers whose schemas
contain objects unless you specifyCASCADEor unless you first explicitlydropthe
user's objects.

CASCADE
SpecifyCASCADEtodropall objects in theuser's schema before dropping theuser. You
must specify this clause todropauserwhose schema contains any objects.

使用cascade参数可以删除该用户的全部objects。要说明的如下：

1 If theuser's schema contains tables, then Oracle Database drops the tables and
automatically drops any referential integrity constraints on tables in other schemas
that refer to primary and unique keys on these tables.

如果用户的schema中有表，则在删除表的时候自动删除与该表相关的主键和外键。

2 If this clause results in tables being dropped, then the database also drops all
domain indexes created on columns of those tables and invokes appropriatedrop
routines.
如果用户的schema中有表，则在删除表的时候自动删除与该表相关的索引。


3 Oracle Database invalidates, but does notdrop, the following objects in other
schemas:
删除用户时，下列在其他用户中的objects不会被删除，只会被置为无效

1 Views or synonyms for objects in the droppeduser's schema
视图，同义词

2 Stored procedures, functions, or packages that query objects in the dropped
user's schema
存储过程，函数，包

4 Oracle Database does notdropmaterialized views in other schemas that are based
on tables in the droppeduser's schema. However, because the base tables no
longer exist, the materialized views in the other schemas can no longer be
refreshed.
其他用户建立的基于被删除用户的物化视图不会被删除，只是不能在刷新了。

5 Oracle Database drops all triggers in theuser's schema.
用户模式下的所有触发器全部被删除

6 Oracle Database does notdroproles created by theuser.
被删除用户建立的其他用户不会被删除

转载自：http://blog.csdn.net/hexiankang1984/article/details/6925180

drop user； 仅仅是删除用户，

drop user××cascade；会删除此用户名下的所有表和视图。

user
Specify theuserto be dropped. Oracle Database does notdropusers whose schemas
contain objects unless you specifyCASCADEor unless you first explicitlydropthe
user's objects.

CASCADE
SpecifyCASCADEtodropall objects in theuser's schema before dropping theuser. You
must specify this clause todropauserwhose schema contains any objects.

使用cascade参数可以删除该用户的全部objects。要说明的如下：

1 If theuser's schema contains tables, then Oracle Database drops the tables and
automatically drops any referential integrity constraints on tables in other schemas
that refer to primary and unique keys on these tables.

如果用户的schema中有表，则在删除表的时候自动删除与该表相关的主键和外键。

2 If this clause results in tables being dropped, then the database also drops all
domain indexes created on columns of those tables and invokes appropriatedrop
routines.
如果用户的schema中有表，则在删除表的时候自动删除与该表相关的索引。


3 Oracle Database invalidates, but does notdrop, the following objects in other
schemas:
删除用户时，下列在其他用户中的objects不会被删除，只会被置为无效

1 Views or synonyms for objects in the droppeduser's schema
视图，同义词

2 Stored procedures, functions, or packages that query objects in the dropped
user's schema
存储过程，函数，包

4 Oracle Database does notdropmaterialized views in other schemas that are based
on tables in the droppeduser's schema. However, because the base tables no
longer exist, the materialized views in the other schemas can no longer be
refreshed.
其他用户建立的基于被删除用户的物化视图不会被删除，只是不能在刷新了。

5 Oracle Database drops all triggers in theuser's schema.
用户模式下的所有触发器全部被删除

6 Oracle Database does notdroproles created by theuser.
被删除用户建立的其他用户不会被删除

转载自：http://blog.csdn.net/hexiankang1984/article/details/6925180