Oracle In-Database Archival - for Financial Transactions

Oracle In-Database Archival features, including ROW ARCHIVAL and ROW MOVEMENT, with partitioning on ORA_ARCHIVE_STATE in the context of financial transactions. 

Introduction 

Financial transactions generate vast amounts of data, which can quickly become difficult to manage and query as the data grows. To address this, organizations must adopt strategies that help them manage and maintain this data efficiently. Oracle provides several features that can help you achieve this goal, including In-Database Archival features. 

This white paper discusses how you can use In-Database Archival features, such as ROW ARCHIVAL and ROW MOVEMENT, in conjunction with partitioning on the ORA_ARCHIVE_STATE column to more efficiently manage financial transaction data. 

ROW ARCHIVAL 

ROW ARCHIVAL is a feature that allows you to mark rows in a table as archived. Archived rows are no longer active, but are retained in the database for historical purposes. By marking rows as archived, you can reduce the amount of data that needs to be actively managed and queried, while still maintaining access to historical data. 

To enable ROW ARCHIVAL, you can use the following SQL statement: 

ALTER TABLE table_name ENABLE ROW ARCHIVAL; 

This statement enables ROW ARCHIVAL for the specified table. Once ROW ARCHIVAL is enabled, a new column called ORA_ARCHIVE_STATE is automatically added to the table. This column is used to store information about the archival state of each row in the table, including whether it is active or archived.

You can mark a row as archived by setting the value of the ORA_ARCHIVE_STATE column to 1 using an update statement. For example: 

 UPDATE table_name SET ORA_ARCHIVE_STATE = 1 WHERE row_id = 123; 

This statement marks the row with row_id 123 as archived. 

ROW MOVEMENT 

ROW MOVEMENT is a feature that allows you to move rows within a table or between tables. This feature is particularly useful when used in conjunction with ROW ARCHIVAL, as it allows you to move archived rows to a separate table or partition. This can improve the performance of queries on active data and reduce the overall storage requirements of your database. 

To enable ROW MOVEMENT, you can use the following SQL statement: 

ALTER TABLE table_name ENABLE ROW MOVEMENT; 

This statement enables ROW MOVEMENT for the specified table. Once ROW MOVEMENT is enabled, you can move rows by updating the ORA_ARCHIVE_STATE.

PARTITIONING ON ORA_ARCHIVE_STATE 

Partitioning is a feature that allows you to split a table into smaller, more manageable pieces. By partitioning a table, you can more easily manage data retention policies, data aging, and data archival. 

To enable partitioning on the ORA_ARCHIVE_STATE column, you can use the following SQL statement: 

 ALTER TABLE table_name MODIFY PARTITION BY LIST (ORA_ARCHIVE_STATE )

(

partition p0 values ('0') TABLESPACE active_data

partion p1 values ('1') TABLESPACE archive_data

);

This statement adds a partition to the table for archived rows. Once you update the value of ORA_ARCHIVE_STATE archived rows will move from Active partition  to Archive partition.

CONCLUSION  

In conclusion, managing financial transaction data can be a daunting task, but In-Database Archival features provided by Oracle can help you manage and maintain this data efficiently. By using ROW ARCHIVAL and ROW MOVEMENT in conjunction with partitioning on the ORA_ARCHIVE_STATE column, you can more easily manage data retention policies, data aging, and data archival. With this strategy, you can reduce the amount of data that needs to be actively managed and queried, while still maintaining access to historical data. This can improve the performance of queries on active data and reduce the overall storage requirements of your database. Overall, using these features can help you achieve better data management, easier data analysis, and better overall database performance.