Question

horizontal fragmentation

Asked by: siddharthkool

Implement the distributed database system based on the student database.
Horizontal partition distribution to distribute the CS dept student info in one site(oracle3) and Math dept. student info in another site(oracle4).
Tables are created in oracle3 and a view of student is created in oracle4.

have created the databse link
 
create table stud(ssn number(2), sname varchar2(10), dept varchar2(25))
partition by list(dept)(
stud1@oracle3 where dept='CS',
stud2@oracle4 where dept='Math');

                                  
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Asked On
2009-07-03 at 01:09:29ID24541795
Tags

oracle sql plus

Topic

Oracle Database

Participating Experts
2
Points
500
Comments
3

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Answers

 

by: schwertnerPosted on 2009-07-03 at 04:14:20ID: 24771579

I think itis not possible to partition a table on two servers in this way.
You have to define two different tables and to use dblink on both machines
When you will need the whole table UNION them in a view:
CREATE OR REPLACE VIEW joint_stud AS
SELECT * FROM stud
UNION ALL
SELECT * FROM stud@oracle3;

On the other instance create the same view but using a DBlink to the first instance.

 

by: shru_0409Posted on 2009-07-03 at 06:38:03ID: 24772255

20120131-EE-VQP-002

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