You can either repair corrupted database in SQL Server manually or professionally. For manual repair, apply DBCC CHECKDB with repair options such as REPAIRREBUILD or REPAIRALLOWDATALOSS. Restore from backup if available, or apply emergency mode for urgent repairs. Put the database in single-user mode before running repairs.

But there are some restrictions with include possible loss of data with REPAIRALLOWDATA_LOSS, and part of the corruption is irreparable. Advanced repairs involve expertise, and system performance is likely to decline during it.

In case the SQL Server's internal tools are unable to rectify the corruption, then the DRS Softech SQL Database Recovery Tool assists you to repair corrupted SQL database. It is a powerful and intuitive solution to recover and restore damaged SQL Server database files (MDF and NDF). It restores deleted or inaccessible database objects like tables, triggers, views, stored procedures, and so on effectively without compromising data integrity.

Easy Steps of "How to Fix SQL Database"
1. Launch the DRS SQL Database Recovery Tool on your screen.
2. Then, click the Open button and click Browse to find and open the targeted MDF file.
3. Select the correct recovery mode and other settings as necessary, then click OK to proceed.
4. It will show the recovered database items in a tree format. Choose the required items and click Save.
5. Specify whether the retrieved data will be saved to a live SQL Server directly or in the form of an SQL script.
6. Make any further settings if needed and press OK to complete the process.

Know More: https://www.data-recovery-solutions.com/blog/repair-corrupted-database-in-sql-server/