DBCC CHECKDB checks the physical and logical integrity of all database objects with DBCC CHECKALLOC, DBCC CHECKTABLE and DBCC CHECKCATALOG. You do not have to run these commands individually as DBCC CHECKDB integrates them all. It performs validation on database and files validates the content of every indexed view,link-level consistencies between tables and files and service broker data in the database.
DBCC CHECKDB supports those databases that has memory-optimized tables but the validation occurs on disk-based tables.
Why do you need to run DBCC CHECKDB?
DBCC CHECKDB notifies you when data comes in a corrupted state. Data Corruption is disastrous, it leads to various concerned factors like failed query execution, incorrect fetched data etc.
Corruption can occur anytime. Cause of corruption can be many such as hardware failure, power failure, issue with storage or in Windows.
Tip: Run DBCC CHECKDB command as your daily job so as to prevent your data from corruption.
What if DBCC CHECKDB fails?
DBCC CheckDB is one of the easiest repair solution command that helps in detecting the corruption but sometimes this command fails in resolving the corruption issue which ultimately leads to return many errors.
The one easy solution you can do is to restore your database from backup. But the problem still exists if you don’t have any backup or you don’t take backup on regular basis or your backup gets corrupted by any hardware or software failure.The database becomes inaccessible.
You can take some measures to solve the problem by checking system applications or SQL server error logs to identify any physically damaged component or simply run DBCC CHECKDB with REPAIR_ALLOW_DATA_LOSS command. But running this command increases chances of critical data loss.
So to prevent your crucial data from data loss, you have professional third-party tools that not only repair your corrupted data but can save your data from Data loss.
SQL Recovery Tool becomes the savior for many professionals and DBAs for saving precious data from data loss. SQL Repair Tool repairs SQL corrupted primary and secondary database files with an ease. It is robust, cheap and easy to use.
The blog discusses, how DBCC CHECKDB works and what are the various issues occur when CHECKDB fails. It also covers various possible solution you can perform when these database console commands get failed. I have also given simple and effective alternative solution on how you can recover your corrupted database by SQL Repair Tool.