Monday, May 3, 2010

Incorrect Updating of System Tables Cause Database Corruption in SQL Server

When you create an MS SQL Server object, the properties of objects are known as metadata. SQL Server stores metadata in a special tables, known as System Tables. You can update these tables as per your requirement. It is quite easy to update system tables by defining the triggers. However, MS SQL Server automatically updates most of the system tables internally using inbuilt API. You should always create a complete backup of all the system tables, before you try to update them. If the update fails or you improperly update the table, your SQL Server database may get severely damaged and you need SQL Database Recovery to be fixed.

The system tables are automatically created by Microsoft SQL Server, when you create an object. For instance, Microsoft SQL Server 2000 stores all your data types and column names in the internal system table, known as 'syscolumns'. The metadata, stored in system tables, can be used to gather performance statistics, discover column and table differences and similarities while upgrading the database, and obtain lock information.

In Microsoft SQL Server 2005 and later versions, the System tables are hidden and cannot be queried like general database tables. These tables are restricted even for the user who have full Database Administrator privileges. Though, system tables are not accessible directly, but there are various inbuilt procedures and views to extract metadata from them.

After accessing the system tables and metadata, you can update them, if required. The update process can be used to add new options or to remove some existing options.

You should work safely while updating the system table. Incorrect or improper updating of SQL Server system tables may lead to severe problems, which might need to reinstall Microsoft SQL Server application. It may also damage the SQL Server database. There is no guarantee of successful updating. Before you prompt for updating system tables, you are highly recommended to create a good backup of SQL Server database.

In case SQL Server database gets damaged due to incorrect updating of system tables, perform SQL Server Recovery by restoring the database from backup.

If backup is unavailable, use MS SQL Recovery software to sort out the problem. The applications are specifically designed to thoroughly scan entire database and extract all inaccessible data from it. They perform simple and secure SQL Recovery with interactive design and read-only behavior.

SQL Recovery software repairs and restores damaged Microsoft SQL Server database in all cases of corruption. The software works well with MS SQL Server 2008, 2005, and 2000. It recovers all damaged SQL Server database objects, such as tables, views, reports, triggers, stored procedures, data types, and more.

No comments:

Post a Comment