In this post, I am sharing one script to find bad processes or sessions of Microsoft SQL Server.
Using this script, you can find block process, and which host, application, a user is running with it.

Running this script will tell you which instance of a process is using lots of CPU on the database server. You can use the loginame or hostname columns to identify the person.

SELECT TOP 25
	spid
	,blocked
	,convert(varchar(10),db_name(dbid)) as DBName
	,cpu
	,datediff(second,login_time, getdate()) as Secs
	,convert(float, cpu / datediff(second,login_time, getdate())) as PScore
	,convert(varchar(16), hostname) as Host
	,convert(varchar(50), program_name) as Program
	,convert(varchar(20), loginame) as Login
FROM master..sysprocesses
WHERE datediff(second,login_time, getdate()) > 0 and spid > 50
ORDER BY pscore desc

In this post, I am sharing scripts to kill all your running processes or sessions of SQL Server.

DBA always set time of database maintenance activities, but sometimes they find few running sessions so they require closing all connections of a SQL Server Database.

Before executing this script, please take care and verify all running connections and processes otherwise this script will harm to your data.

You require this type of script very occasionally, but I am sharing here because this is also one of the important scripts for SQL DBA.

How to find running sessions or processes in SQL Server?

Script to find Running Process and Session in SQL Server

Command to Kill particular session_id:

KILL 'session_id'

Script to kill multiple sessions:

DECLARE @DatabaseName nvarchar(50)
SET @DatabaseName = 'dbrnd'

DECLARE @SQL varchar(max)
SET @SQL = ''

SELECT @SQL = @SQL + 'Kill ' + Convert(varchar, SPId) + ';'
FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId

EXEC(@SQL)

Change your database mode from multi-user to single-user:

Once you change the database mode from multi-user to single-user, SQL Server immediately stops all the connections of the database. No one can connect to that database.

The DBA can perform the maintenance activity and after that, they can again change the database mode from single-user to multi-user.

To set Single User:

ALTER DATABASE [Database_Name] SET SINGLE_USER WITH ROLLBACK IMMEDIATE

To set Multi User:

ALTER DATABASE [Database_Name] SET MULTI_USER WITH ROLLBACK IMMEDIATE

In this post, I am sharing different ways to show the currently running processes and sessions in MySQL.

Also, I am sharing a command for killing any running or sleep process.

When DBA is monitoring the database, it requires to find and kill some unwanted processes of MySQL Server.

How to find running processes or sessions?

Below are three different ways:

SELECT * 
FROM INFORMATION_SCHEMA.PROCESSLIST 
WHERE COMMAND != 'Sleep';

show  processlist;

/*Execute using MySQL Console*/
mysqladmin -u root -p -i 1 processlist;

How to kill running processes or sessions?

KILL CONNECTION <processid>