LOGON Trigger fires in response to LOGON events of SQL Server is raised.

A LOGON Triggers can be useful in many ways, such as to restrict number of connection made by a Login or to prevent a user from logging-in outside .

For example, you can create a LOGON Trigger to restrict a user from simultaneously opening more than one connections with the SQL Server.

CREATE TRIGGER restrict_sqlsession
ON ALL SERVER WITH EXECUTE AS 'sa'
FOR LOGON
AS
BEGIN
IF ORIGINAL_LOGIN() <> 'sa'
AND
( SELECT COUNT(*)
FROM sys.dm_exec_sessions
WHERE Is_User_Process = 1 AND
Original_Login_Name = ORIGINAL_LOGIN()
) > 2
ROLLBACK
END

Now if user try to access more than one session in SQL Server, it returns an error as shown below.

 

Also Read..

DDL TRIGGER

LOGON Trigger

SQL Basics Tutorial	SQL Advance Tutorial	SSRS	Interview Q & A
SQL Create table	SQL Server Stored Procedure	Create a New SSRS Project	List Of SQL Server basics to Advance Level Interview Q & A
SQL ALTER TABLE	SQL Server Merge	Create a Shared Data Source in SSRS	SQL Server Question & Answer Quiz
SQL Drop	SQL Server Pivot	Create a SSRS Tabular Report / Detail Report
..... More	.... More	....More
Power BI Tutorial	Azure Tutorial	Python Tutorial	SQL Server Tips & Tricks
Download and Install Power BI Desktop	Create an Azure storage account	Learn Python & ML Step by step	Enable Dark theme in SQL Server Management studio
Connect Power BI to SQL Server	Upload files to Azure storage container		SQL Server Template Explorer
Create Report ToolTip Pages in Power BI	Create Azure SQL Database Server		Displaying line numbers in Query Editor Window
....More	....More		....More

 176 total views,  1 views today