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Is there an automated process to archive big tables?
When I started to analyze the client’s historical data, I realized that there were no existing archive processes and the data was not archived, neither automatically nor manually. Some data goes back up to 5 years, resulting in a substantial increase of the database size.
How often do you need to archive a SQL table?
However, many of these tables are simply keeping log, or history, data that can be archived and kept outside the user database in a special archive database. Many DBAs move data during a regular maintenance window that can happen quarterly, every half a year, or even once a year.
Is there a way to archive a database?
To archive just rename the existing back-end database to indicate that it is an archive, and save the empty copy as the new back-end database. First, import the table definitions for all the tables in the back-end database. On the File tab click New, select Blank database, and then click Create. Close Table1.
How to create control table in SQL archive?
Create the Control Table: Create the control table in the Archive database to monitor the progress of the initial step of the process. This also gives the ability to easily verify the number of records in the archived and original tables. The number of archived records should match between those two tables.
How are log tables used in data archiving?
Those are: Reduce the size of the backups and the time to run backup processes. Log/historical tables are populated by means of executing certain stored procedures. This means that table locking should be minimized during data archiving.
What is the structure of an archive table?
The structure of the archive table is below: Create the Control Table: Create the control table in the Archive database to monitor the progress of the initial step of the process. This also gives the ability to easily verify the number of records in the archived and original tables.
How is an archive table created in SQL?
The archive table structure in the Archive database is created based on the modified client’s log table. We are going to modify the original table and add an identity column as the primary key.
How big should a SQL archive file be?
Data archiving processes should cause appreciable growth of the database log file. Clients should have the full week of historical data. The average daily historical data for one client grows to about 100,000 rows, and we have 40+ clients with 5 to 10 such tables.
How to migrate data to tables with foreign key constraints?
For example, the country, state and district tables are linked with foreign key constraints. The package created by the wizard attempts to Import the district data before the state data generating constraint errors that cause the migration to fail.
How are records added to an archive table?
Periodically runs a query that selects the records for archiving, and adds the data to an archive table, and you then run a query to selects the same records (from the original table) and delete them. Some of the records in a table meet the condition that you use to determine whether to archive.
Can you use a macro to archive a database?
You must archive the database manually. You cannot use a macro for this method. Periodically runs a query that selects the records for archiving, and adds the data to an archive table, and you then run a query to selects the same records (from the original table) and delete them.