Table with 200 millions records.

Question

Dear all,
I have to create table which will accept 200 millions record. I have to do monthly report from these data.
The performance make me very very concern, does anyone has any suggestion?
Thanks in advance.

Answer 1

Hi,
I have a situation like yours.
Each month, you need to create a new partition, for the next year, this is anothers partition.
For example, you have a table
SQL> CREATE TABLE sales99_cpart(
2> sale_id NUMBER NOT NULL,
3> sale_date DATE,
4> prod_id NUMBER,
5> qty NUMBER)
6> PARTITION BY RANGE(sale_date)
7> SUBPARTITION BY HASH(prod_id) SUBPARTITIONS 4
8> STORE IN (data01,data02,data03,data04)
9> (PARTITION cp1 VALUES LESS THAN('01-APR-1999'),
10> PARTITION cp2 VALUES LESS THAN('01-JUL-1999'),
11> PARTITION cp3 VALUES LESS THAN('01-OCT-1999'),
12> PARTITION cp4 VALUES LESS THAN('01-JAN-2000'))
13> /
For the next year, add new partition and subpartition.
Subpartitions are like table, after what you can use parallel query. It is very interristing for good performance.
You can partition table by range on date, and subpartition by hash on id callcenter.
Next year, if you want history, you can drop only one subpartition.
The cost : Oracle partitionning is an option of Oracle entreprise edition, this is not default option.
Nicolas.