oracle的外部表,或者备份单个表到外部文件

这是Tom的深入数据库体系结构的例子,学习了

备份表到外部文件

create table gftuser

organization external

(type oracle_datapump

default directory tmp

location('test0801.dmp')

)

as

select * from all_objects

从外部文件到数据库

create table t

( OWNER VARCHAR2(30),

OBJECT_NAME VARCHAR2(30),

SUBOBJECT_NAME VARCHAR2(30),

OBJECT_ID NUMBER,

DATA_OBJECT_ID NUMBER,

OBJECT_TYPE VARCHAR2(19),

CREATED DATE,

LAST_DDL_TIME DATE,

TIMESTAMP VARCHAR2(19),

STATUS VARCHAR2(7),

TEMPORARY VARCHAR2(1),

GENERATED VARCHAR2(1),

SECONDARY VARCHAR2(1)

)

organization external

( type oracle_datapump

default directory TMP

location( 'test0801.dmp' )

)