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oracle_datapump创建外部表案例

Jun 07, 2016 pm 04:48 PM

一、datapump创建外部表,数据来源于内部实体表 --首先创建 scott.countries实体表,用于做实验 SQLgt; create table scott.cou

一、datapump创建外部表,数据来源于内部实体表

--首先创建 scott.countries实体表,用于做实验

SQL> create table scott.countries(

  2 country_id number,

  3 country_name varchar2(30),

  4 country_reigion varchar2(30)

  5 );

 

Table created.

 

SQL> insert into scott.countries values(1,'AMERICA','america');

 

1 row created.

 

SQL> insert into scott.countries values(2,'china','zhuzhou');

 

1 row created.

 

SQL> insert into scott.countries values(3,'JAPAN','dongjing');

 

1 row created.

 

SQL> commit;

 

Commit complete.

--参考官方datapump创建外部表的案例(其数据来源于内部实体表),如下:

 

 

做以下修改后(红色字体部分内容),创建外部表

 CREATE TABLE scott.countries_ext

    ORGANIZATION EXTERNAL

    (

      TYPE Oracle_DATAPUMP

      DEFAULT DIRECTORY dir --生成dmp文件存放路径

      LOCATION ('countries_ext.dmp') --生成外部文件的名称

    )

    AS SELECT * FROM scott.countries; --数据来源于实体表

--执行以上创建外部表的语句

SQL> CREATE TABLE scott.countries_ext

  2 ORGANIZATION EXTERNAL

  3 (

  4 TYPE ORACLE_DATAPUMP

  5 DEFAULT DIRECTORY dir

  6 LOCATION ('countries_ext.dmp')

  7 )

  8 AS SELECT * FROM scott.countries;

 

Table created.

 

SQL> select * from scott.countries_ext;

 

COUNTRY_ID COUNTRY_NAME COUNTRY_REIGION

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

        1 AMERICA america

        2 china zhuzhou

        3 JAPAN dongjing

由此可见,创建外部实体表成功。

--查看dir外部文件存放路径,,并检查是否生成了countries_ext.dmp文件

SQL> select * from dba_directories;

 

OWNER DIRECTORY_NAME DIRECTORY_PATH

---------- -------------------- --------------------------------------------------
 
SYS DATA_PUMP_DIR /u01/app/oracle/product/10.2.0/db_1/rdbms/log/

SYS DIR /home/oracle/dir

[oracle@gc1 dir]$ cd /home/oracle/dir

[oracle@gc1 dir]$ ls

COUNTRIES_EXT_14214.log countries_ext.dmp ldr.ctl ldr.log PROD_MY_12177.log PROD_MY_14213.log PROD_MY_14214.log prod_my.data
 
二、datapump创建外部表,数据来源于外部dmp文件

--gc2机器创建外部表存放文件目录,同gc1

[oracle@gc2 dbs]$ cd /home/oracle

[oracle@gc2 ~]$ mkdir dir

[oracle@gc2 ~]$ cd dir

--数据库创建对应文件目录,并赋予操作权限给所有用户

SQL> create directory dir as '/home/oracle/dir';

 

Directory created.

 

SQL> grant all on directory dir to public;

 

Grant succeeded.

 

更多详情见请继续阅读下一页的精彩内容:

Oracle 10g成功创建外部表详解

oracle_loader类型外部表

oracle_datapump类型外部表

Oracle外部表的一次维护

Oracle的外部表,或者备份单个表到外部文件

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