Sometimes the database at the time of occupation, want to do some operations can not be operated. Database may attempt to switch to single-user mode is operated. Switch back to multi-user mode after completing the operation.
Command is as follows:
alter database database name set Single_user - Single User
alter database database name set multi_user - Multi-User
or
sp_dboption database name, "single user", true - Single User
sp_dboption database name, "single user", false - Multi-User
If you use ALTER DATABAS or use SP_DBOPTION have no way to change to a multi-user or single-user mode
solution is
in the Activity Monitor process and, related to the purpose of the library KILL off, then refresh.
Use
ALTER DATABASE DB_TYZ modify just fine
Original Address: https://www.cnblogs.com/xdoudou/p/3733505.html