Database file Corruption Repair

"Scene":
Only the database name in the Object Browser, the database does not open, view the log "the log cannot be rebuilt because the database is not completely shut down." , presumably because the server is abnormally shut down, causing the database not to write data properly.

"Processing method": Repair the data, discard the exception data.
DBCC CHECKDB (MyDB, Repair_allow_data_loss), if you want to use a single user

"Complete Processing Method":

The ALTER database [mydb] SET emergency--emergency state is marked as READ_ONLY, disables logging, and is accessible only to members of the sysadmin fixed server role. EMERGENCY is primarily used for troubleshooting. ALTER DATABASE [MYDB] set SINGLE_USERDBCC CHECKDB (MyDB, REPAIR_ALLOW_DATA_LOSS) ALTER DATABASE [MYDB] set Multi_user

Note
If the above execution is unsuccessful, proceed as follows:
1, Database MyDB offline
2. Copy the MDF file to the new location
3, delete the original database MyDB
4, create a new library MyDB
5, Offline MyDB
6. Overwrite the backed-up MDF file with the new library
7, online new library, this is the suspect status
8. Perform "Complete processing"

Database file Corruption Repair