Today all businesses utilize databases for practically all operations, ranging from sales & marketing to CRM. Hence, whenever organizations face a database failure, they are susceptible to losing crucial data that may be costly for the entire business. Microsoft SQL is a popular RDMS in all firms or organizations for professionally managing valuable data. SQLServer is incredibly useful in the business circuit, yet it has some corruption issues and errors that DBAs need to tackle strategically.
Because of SQL database errors, users are unable to access their valuable data, and it is their responsibility to fix the issues promptly to make sure that there are no severe data loss issues. There are some predominant database corruption errors and issues. You may promptly resolve them to avoid undesirable severe data loss. We will know more about database corruption errors, issues, and perfect solutions for fixing SQL server database problems.
Causes of SQL Database Corruption
Usually, there are three main reasons behind database failure. Let us examine each of them and identify ways to recover and restore your lost data.
File System Damage
If a computer or server is shut down improperly, or if it encounters a power outage or surge or something occurs that abruptly interrupts the process of writing data to the files, there are chances of the OS files getting corrupted or damaged severely. This may lead to critical data loss. After encountering such a crisis, you are advised to repair or at least, examine the filesystem to safeguard against any data loss in the future. For modifying or mounting a file system, a repair may be necessary. Even though a thorough check may not report or reveal any severe damage, you might still need to repair the filesystem.
According to Small Business Chron, organizations of all sizes depend on SQLServer database from Microsoft for organizing and securing critical information. If one or even more database files are corrupted or damaged, they may result in database failure at your file-level leading to corruption. Files may be damaged because of numerous reasons. Primary files that are capable of corrupting the entire database, may themselves get corrupted because of any SQLServer account changes, file header corruption, and accidental data deletion, among many others. In case of corruption in secondary files, the SQL database will be inaccessible. When you attempt to access the damaged database, you will be getting different types of error messages. You may be several solutions for effectively repairing a corrupt database, but these solutions will not guarantee or assure you that there will be100 percent data recovery. You may consider using the log files for restoring the database. But remember that the log files are not adequate t help recover lost data in corruption cases since often backup files may get damaged if corruption seems to be severe.
Another effective way of repairing the corrupt or compromised database is by utilizing database console commands like CHECKDB, DBCC, or DBCC DEBREPAIR. These commands could help fix minor database issues. However, they are not efficient enough to tackle or resolve critical corruption cases.
Hardware & Software Failure
Hardware failures will be including memory issues, bad disk sectors, disk crashes, and even disk with errors, among many other issues. Hardware failures could be because of design errors, overloading, and poor quality control at the time of fabrication, and degradation of mechanical parts. Software failures will be including issues associated with software like DBMS software, operating system, application programs, etc.
Irrespective of how trustworthy, your DBMS seems, it is not in a position to guarantee a failure-free seamless transaction each time. To prevent any kind of database failure, the most logical and proactive step is to consult with expert DBAs. Once the overall database health is analyzed, you may rest assured to avoid serious problems down the line.
Avoiding SQL Database Corruption: Some Expert Tips
- Do not consider rebooting the server
- During any ongoing script execution or other running database, jobs avoid abrupt shutting down the SQLServer.
- Always keep proper backup and then upgrade your SQLServer
- Don’t connect or re-connect the database.
Users should regularly back up their SQL database to restore the database, in case of corruption or damage. Backup is certainly the most effective way of dealing with corruption. Keep in mind that some data may be missing between the time when disaster struck and the last backup. You may consider using commands like DBCC CHECKDB to examine and resolve corruption issues. However, you may fail to repair and restore severely corrupted files using this command.
You may use SQL data recovery tools recommended by experts to repair and resolve corrupt database file issues due to a lack of a backup. Some cutting-edge tools are helpful in the recovery of deleted objects, and they even display a preview. SQL recovery could prove to be a daunting and stressful job. However, you may use some advanced SQL recovery tools for getting your databases back into action!