Remove SQL Server database from single-user mode

Braindump of a session where I had to remove a SQL Server database from single-user mode.

execute sp_dboption

1> exec sp_dboption 'testdb01', 'single user', 'FALSE';
2> go
Msg 5064, Level 16, State 1, Server REMIDIAN01, Line 1
Changes to the state or options of database 'testdb01' cannot be made at this
time. The database is in single-user mode, and a user is currently connected to
it.
Msg 5069, Level 16, State 1, Server REMIDIAN01, Line 1
ALTER DATABASE statement failed.
sp_dboption command failed.

Now I can use TSQL below to find all the database sesions connected to this database.

TSQL script to retrieve client sessions per database.

select d.name, d.dbid, spid, login_time, nt_domain, nt_username, loginame
  from sysprocesses p inner join sysdatabases d on p.dbid = d.dbid
 where d.name = 'testdb01'
go
 

Kill the particular session(s) with the ;kill’ command.

1> kill 51
2> go
1>

Now I can ‘remove’ the database from Sinlge user mode.

1> exec sp_dboption 'testdb01', 'single user', 'FALSE'
2> go
1>