Script to Kill All Connections to a Database (More Than Restricted_User Rollback)

Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)

Updated

For MS SQL Server 2012 and above

USE [master];

DECLARE @kill varchar(8000) = '';  
SELECT @kill = @kill + 'kill ' + CONVERT(varchar(5), session_id) + ';'  
FROM sys.dm_exec_sessions
WHERE database_id  = db_id('MyDB')

EXEC(@kill);

For MS SQL Server 2000, 2005, 2008

USE master;

DECLARE @kill varchar(8000); SET @kill = '';  
SELECT @kill = @kill + 'kill ' + CONVERT(varchar(5), spid) + ';'  
FROM master..sysprocesses  
WHERE dbid = db_id('MyDB')

EXEC(@kill); 

How do you kill all current connections to a SQL Server 2005 database?

The reason that the approach that Adam suggested won't work is that during the time that you are looping over the active connections new one can be established, and you'll miss those. You could instead use the following approach which does not have this drawback:

-- set your current connection to use master otherwise you might get an error

use master
ALTER DATABASE YourDatabase SET SINGLE_USER WITH ROLLBACK IMMEDIATE 

--do you stuff here 

ALTER DATABASE YourDatabase SET MULTI_USER

How to close existing connections to a DB

This should disconnect everyone else, and leave you as the only user:

alter database YourDb set single_user with rollback immediate

Note: Don't forget

alter database YourDb set MULTI_USER

after you're done!

How to close all existing connections to a DB programmatically

You get that error when you are call Open() on a connection twice. You should make all SqlConnection objects you create inside using blocks and only open them once.

If you are reusing connections "to make it faster" .NET already does that by default for you via Connection Pooling but you must dispose of the connection object to make it work.

Automatically kill session of some specific task

Sometimes I use this old query to get rid of sessions with specific description:

declare @t table (sesid int)

--Here we put all sessionid's with specific description into temp table
insert into @t 
select spid
from sys.sysprocesses 
where dbid = db_id() 
  and spid <> @@SPID 
  and blocked <> 0  
  and lastwaittype LIKE 'LCK%'

DECLARE @n int,
        @i int= 0,
        @s int,
        @kill nvarchar(20)= 'kill ',
        @sql nvarchar (255)

SELECT @n = COUNT(*) FROM @t
--Here we execute `kill` for every sessionid from @t in while loop
WHILE @i < @n
BEGIN 
    SELECT TOP 1 @s = sesid from @t
    SET @sql = @kill + cast(@s as nvarchar(10))

    --select @sql
    EXECUTE sp_executesql @sql

    delete from @t where sesid = @s
    SET @i = @i + 1
END

How do I specify close existing connections in sql script

You can disconnect everyone and roll back their transactions with:

alter database [MyDatbase] set single_user with rollback immediate

After that, you can safely drop the database :)

---

Related Topics