SQL Server Database Corruption by Applying Alter Table Command to Change a Column Value from Not Null to Null

After you apply the ‘Alter Table’ T-SQL or Transaction-SQL command to modify a column that is not null to null, you may get incorrect results. The problem occurs if the database column is a clustered index key in SQL Server. Furthermore, you may face any of the given corruption symptoms:

•    You get records that have null columns.
•    A database has marked as suspect. Furthermore, the database becomes unavailable. In the Server error log, you find runtime errors that look like the following:

•    When you run dbcc checkdb command, you will get corruption errors.
Reasons of the problem
There are two possible reasons of this issue:
•    Syscolumns and sysindexes system tables are damaged
•    A column is the part of the clustered index key that might be null
It is the critical situation of SQL Server database corruption that requires being resolved as soon as possible.
How to fix it

You can resolve the issue only by repairing the damaged database. You can repair the database of MDF file by using the SQL Recovery software. SQL recovery are the third party applications designed for MDF repair in all critical situations of MDF corruption.

MDF recovery software are fairly easy to use and the SQL repair can be carried out by user itself without having any sound technical knowledge. The effective SQL recovery software can perform complete MDF repair and the else case can worse the scenario.

Stellar Phoenix SQL Database Recovery is the best ever made and easy to use SQL recovery software that is applicable in each case of MDF corruption. Using this MDF repair software, you can repair and restore all of the SQL server objects such as tables, reports, macros, stored procedures, user defined data types, defaults and many others.

Sysdepends Table Corruption and SQL Recovery

Sysdepends table is a MS SQL Server database table which stores dependency information between database objects such as views, stored procedures, and triggers in the database. It also stores the database objects such as tables, views and procedures that are contained in their definition. The table contains one row for every view, procedure, trigger, or table.
It is the most important table that is required to maintain database relationships and finally the relational database management system. For proper functioning of the database relationships and accessing of the data, apt working of sysdepends table is required.

But sometimes, failure to provide adequate space for the database growth during the MS SQL Server upgrade process may damage the sysdepends table in the database or may cause the process to hang (stop responding) without any error message.
The problem occurs when the master database or module does not have enough space in the database field to fit in it. After damage, all of the database objects become inaccessible and the database becomes unusable.
Root of the issue

If the data file of the SQL Server is almost full (only few of the pages are free) and the file enlargement of the data file is placed to ‘0’ % (percent), the upgrade procedure doesn’t have the enough space needed to complete the upgrade of the database and the SQL database is left in an incompletely upgraded but damaged state.
Resolution

You can work around this issue by restoring your SQL Server database of MDF file from the backup. Backup is the duplicate copy of any database or data set that is stored on any external storage device or media other than the actual one.
But the conditions can become extremely grave if you don’t have proper backup of your data. It can plunge you in need of MDF recovery. MDF recovery can be achieved by availing the SQL recovery software.

SQL recovery software are the applications that are Do It Yourself solutions to tackle with all of the MDF corruption related issues. These software systematically scan the affected hard drive and make the MDF repair feasible.
Stellar Phoenix SQL Database Recovery is the most advanced and powerful SQL recovery software that is designed to meet different kinds of data loss problems. This SQL repair software comes equipped with a simple, interactive and cool looking user interface that formulates the user part very easy.

Highly developed scanning algorithms are used by this MDF recovery software to get the required end result of SQL recovery. There is no need to worry about the originality of your database as this is a read only and non destructive SQL recovery software.

Volume Mounting and Database Corruption in SQL Server

A mounted drive is a drive or a volume which is mapped to a directory on the volume that utilizes the NTFS or New Technology File System. Mounted volumes work as any other drive or volume. A mounted volume is assigned a volume path in spite of a volume letter.

Mounted drives are generally referred to as “mount points,” as “mounted volumes,” as “mountpoints,” or as “volume mount points.” Mounted drives can be created by using the Disk Management snap-in or Microsoft Windows 2000 or through the Mountvol.exe file.

Although mounted volumes is the feature of Windows 2000 operating system, mounted drives aren’t supported by Windows 2000 cluster servers as a consequence of the failover demeanor on Windows 2000 clustered servers for mounted volumes and because of the allocation of dissimilar GUIDs (Globally Unique Identifier) for every disk on every node.

The SQL Server 2000 and 2005 resource depends upon the SQL network name resources and the physical drive resources that store their data. When volume mount points are being used simultaneously with the physical drives, every volume mount point must appear as a cluster resource.

Furthermore, each volume mount point should also be made as a necessary part of a SQL Server dependency. When only the root physical drives dependency is added the volume mount points are not included, SQL Server database corruption would occur on failover. Database corruption might also take place when SQL Server is restarted devoid of failover.

It is really very devastating for an organization and can’t be accepted at any cost. In such circumstances, all of the precious and important data stored in the SQL Server database becomes inaccessible and you fall in need of SQL recovery.
SQL recovery requires the systematic scanning of the MDF file and perfect MDF repair. You need for a tool that can methodically scan the entire SQL server database and can do MDF recovery in an effective fashion.

It is quite possible through third party applications known as SQL repair software. SQL repair software can concentrate on all the database corruption associated matters and can end their job with total MDF recovery.

Selecting the right SQL recovery software is extremely significant because the else case can make the scenario worsen. The select MDF recovery tool should be effective and be able to tackle with all of the corruption issues.
Stellar Phoenix SQL Database Recovery is the furthest and the best concert giving SQL recovery software that is capable to addressing all of the database corruption problems. Outstanding scanning algorithms make this software more powerful and increases the chances of data recovery up to the maximum level of possibility.

Synergistic and spontaneous user interface of the software makes it completely easy for the user to take advantage of the software without having any prior technical knowledge. There is no need to worry at all about the consistency of the data as this MDF recovery software doesn’t perform any write operation to the hard drive due to its read only and non destructive behavior.

SQL Recovery of Data Dependencies

In computer science, data dependency is a situation in which an instruction (program statement) refers to the data of the preceding instruction (statement). For successful completion of the instruction, it is significant for all the databases or tables to work in proper way.

Today, several organizations have to tackle with troubles in maintaining inheritance database applications such as MS SQL Server. Due to the unmanaged data dependency, the applications are getting harder and harder to maintain. To address the issues and to upgrade these applications, re-engineering is a significant means.
Read the rest of this entry »

Error 5180 in SQL Server Database

MS SQL Server is the most popular and widely used database management software. it provides concurrent access of a database from several different locations. SQL Server also provides the extended security and stability of your data.
But sometimes, when you try to open a database or MDF file or attempt SELECT, UPDATE, INSERT, or DELETE operation, you may fail to do it and instead of getting any result from these statements, you may get the following error message:
“Error: 5180, Severity: 22, State: 1

Could not open FCB for invalid file ID 0 in database ‘pubs’. Table or database may be corrupted.”
When this issue occurs, the users that are executing the shrink operation to the database may fail with 1968 error message that is ultimately reported by CHECKALLOC or CHECKDB command. The size of tempdb may also get increased due to this problem.

The problem generally occurs due to corruption in MDF file. the MDF file may get damaged due to several reasons such as incomplete file or database shrink operation, improper system shutdown, virus attack and many other.
Due the corruption in the MDF file, you may not be able to access any data from the SQL Server database and it may affect your business. The data stored in the MDF file is at stake of loss and it can be the worst situation that an organization can face.
Work Around

The solution of this problem is to restore your SQL Server database from the backup. You can restore the damaged database from the backup and can correct the problem very easily. For complete and proper restoration, the backup should be sufficient and appropriate.

Unfortunately, if you don’t have backup or it hasn’t been updated, then the situations can become worsen. In such critical situations, the only way out is to repair MDF file using third party SQL recovery applications.
SQL Repair software are the specially designed application programs that can help you in completely repairing MDF file and restoring it. These software are very easy to use and you can perform Do It Yourself SQL repair.

The MDF repair software that you are going to apply to your damaged database should be safe and it should not alter the database and further damage it. the SQL Recovery software should guarantee you the complete MDF recovery with the use of its advanced scanning algorithms.

Stellar Phoenix SQL Database Recovery is the highly developed MDF repair software that can repair and restore the damaged MDF file in its original format without altering the original data. This SQL repair software uses the most advanced scanning algorithms to thoroughly scan the damaged database and repair and restore it.

The user interface of this SQL recovery software is very simple, interactive, cool looking and intuitive so that you won’t find it difficult to use this software. this SQL repair software can repair and restore all of the damaged objects of the database such as tables, queries, reports, triggers, stored procedures, macros, relationships, and database references.

Stellar Rolls out SQL Recovery software

Stellar Information System Ltd. introduces SQL Recovery software. The data recovery company, which has achieved its customer’s satisfaction up to a peak level through its topmost data recovery services and products, has now come up with new software which can recover and repair corrupted Microsoft SQL server Database file. Until now Stellar is known for its quality products and this MS SQL Repair application is in the line of its next achievement as it can restore the damaged .mdf files for instances like Virus attack, system shutdown, media read error and so on. This software would prove as a boon to all those who are facing data loss due to SQL database corruption.

Stellar Phoenix MS SQL Data Recovery software-launched by Stellar  is the best solution for repairing corrupted MS SQL server databases. It has been developed seeking the comfort l zone of the users during its use and very well adapted to scan thoroughly and completely the corrupted .mdf files in order to extract as much data as possible.

This MS SQL Repair software can repair the database after:· Corruption due to virus attack
· Corruption due to application malfunctioning.
· Occurrence of media read error.
· Improper system shutdown.

This MS SQL Repair software goes good repairing the MS SQL server databases after any instance of database corruption and with any file version of Windows and thus acting as a complete solution for your corrupted SQL databases.

For more detailed features and abilities of the software visit: http://www.repair-mssql-database.com


 

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