Active Sessions on SQL Server

We can use the below script to quickly identify the active sessions on the server and their details

SELECT s.session_id
	,r.STATUS
	,r.blocking_session_id 'blocked by'
	,r.wait_type
	,wait_resource
	,r.wait_time / (1000.0) 'Wait Time (in Sec)'
	,r.cpu_time
	,r.logical_reads
	,r.reads
	,r.writes
	,r.total_elapsed_time / (1000.0) 'Elapsed Time (in Sec)'
	,Substring(st.TEXT, (r.statement_start_offset / 2) + 1, (
			(
				CASE r.statement_end_offset
					WHEN - 1
						THEN Datalength(st.TEXT)
					ELSE r.statement_end_offset
					END - r.statement_start_offset
				) / 2
			) + 1) AS statement_text
	,Coalesce(Quotename(Db_name(st.dbid)) + N'.' + Quotename(Object_schema_name(st.objectid, st.dbid)) + N'.' + Quotename(Object_name(st.objectid, st.dbid)), '') AS command_text
	,r.command
	,s.login_name
	,s.host_name
	,s.program_name
	,s.host_process_id
	,s.last_request_end_time
	,s.login_time
	,r.open_transaction_count
FROM sys.dm_exec_sessions AS s
INNER JOIN sys.dm_exec_requests AS r ON r.session_id = s.session_id
CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) AS st
WHERE r.session_id != @@SPID
ORDER BY r.cpu_time DESC
	,r.STATUS
	,r.blocking_session_id
	,s.session_id

Hope it helps !!

SQL Server Agent Alerts : Part 2

We can use the below script to create SQL Server Agent alerts to notify the operator in case of any Data Consistency Errors in Replication

Below are the common data consistency errors that can occur:

• 2601 Cannot insert a duplicate key row in object
• 20598 The row was not found at the Subscriber when applying the replicated command.
• 2627 Violation of PRIMARY KEY constraint 'PK_'

USE [msdb];
GO

SET NOCOUNT ON;

-- Change @OperatorName as needed
DECLARE @OperatorName SYSNAME = N'DBAOperator';
-- Change @CategoryName as needed
DECLARE @CategoryName SYSNAME = N'SQL Server Agent Alerts';

-- Make sure you have an Agent Operator defined that matches the name you supplied
IF NOT EXISTS (
		SELECT *
		FROM msdb.dbo.sysoperators
		WHERE name = @OperatorName
		)
BEGIN
	RAISERROR (
			'There is no SQL Operator with a name of %s'
			,18
			,16
			,@OperatorName
			);

	RETURN;
END

-- Add Alert Category if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM msdb.dbo.syscategories
		WHERE category_class = 2 -- ALERT
			AND category_type = 3
			AND name = @CategoryName
		)
BEGIN
	EXEC dbo.sp_add_category @class = N'ALERT'
		,@type = N'NONE'
		,@name = @CategoryName;
END

-- Get the server name
DECLARE @ServerName SYSNAME = (
		SELECT @@SERVERNAME
		);
--AG
DECLARE @Error2601AlertName SYSNAME = @ServerName + N' Alert - Replication: Cannot insert duplicate key row in object';
DECLARE @Error20598AlertName SYSNAME = @ServerName + N' Alert - Replication: The row was not found at the Subscriber';
DECLARE @Error2627AlertName SYSNAME = @ServerName + N' Alert - Replication: Violation of PRIMARY KEY constraint';

IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error2601AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error2601AlertName
		,@message_id = 2601
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 600
		,@include_event_description_in = 5
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000'

IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error2601AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error2601AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error20598AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error20598AlertName
		,@message_id = 20598
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 600
		,@include_event_description_in = 5
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000'

IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error20598AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error20598AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error2627AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error2627AlertName
		,@message_id = 2627
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 0
		,@include_event_description_in = 5
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000'

IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error2627AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error2627AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END
GO

Hope it helps !!

SQL Server Agent Alerts- Part 1

We can use the below script to create SQL Server Agent alerts to notify the operator defined.  The script is adapted from the post written by GLENN BERRY. The script creates alerts for high severity errors (from 19 to 25), alert for Error 832, and for Errors 855, 856 & few Alwayson Alerts (if enabled)

USE [msdb];
GO

-- Change @OperatorName as needed
DECLARE @OperatorName SYSNAME = N'DBAOperator';
-- Change @CategoryName as needed
DECLARE @CategoryName SYSNAME = N'SQL Server Agent Alerts';

IF NOT EXISTS (
		SELECT *
		FROM msdb.dbo.sysoperators
		WHERE name = @OperatorName
		)
BEGIN
	RAISERROR (
			'There is no SQL Operator with a name of %s'
			,18
			,16
			,@OperatorName
			);

	RETURN;
END

IF NOT EXISTS (
		SELECT *
		FROM msdb.dbo.syscategories
		WHERE category_class = 2 -- ALERT
			AND category_type = 3
			AND name = @CategoryName
		)
BEGIN
	EXEC dbo.sp_add_category @class = N'ALERT'
		,@type = N'NONE'
		,@name = @CategoryName;
END

-- Get the server name
DECLARE @ServerName SYSNAME = (
		SELECT @@SERVERNAME
		);
-- Alert Names start with the name of the server 
DECLARE @Sev19AlertName SYSNAME = @ServerName + N' Alert - Sev 19 Error: Fatal Error in Resource';
DECLARE @Sev20AlertName SYSNAME = @ServerName + N' Alert - Sev 20 Error: Fatal Error in Current Process';
DECLARE @Sev21AlertName SYSNAME = @ServerName + N' Alert - Sev 21 Error: Fatal Error in Database Process';
DECLARE @Sev22AlertName SYSNAME = @ServerName + N' Alert - Sev 22 Error: Fatal Error: Table Integrity Suspect';
DECLARE @Sev23AlertName SYSNAME = @ServerName + N' Alert - Sev 23 Error: Fatal Error Database Integrity Suspect';
DECLARE @Sev24AlertName SYSNAME = @ServerName + N' Alert - Sev 24 Error: Fatal Hardware Error';
DECLARE @Sev25AlertName SYSNAME = @ServerName + N' Alert - Sev 25 Error: Fatal Error';
DECLARE @Error823AlertName SYSNAME = @ServerName + N' Alert - Error 823: The operating system returned an error';
DECLARE @Error824AlertName SYSNAME = @ServerName + N' Alert - Error 824: Logical consistency-based I/O error';
DECLARE @Error825AlertName SYSNAME = @ServerName + N' Alert - Error 825: Read-Retry Required';
DECLARE @Error832AlertName SYSNAME = @ServerName + N' Alert - Error 832: Constant page has changed';
DECLARE @Error855AlertName SYSNAME = @ServerName + N' Alert - Error 855: Uncorrectable hardware memory corruption detected';
DECLARE @Error856AlertName SYSNAME = @ServerName + N' Alert - Error 856: SQL Server has detected hardware memory corruption, but has recovered the page';

-- Sev 19 Error: Fatal Error in Resource
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev19AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev19AlertName
		,@message_id = 0
		,@severity = 19
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev19AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev19AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 20 Error: Fatal Error in Current Process
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev20AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev20AlertName
		,@message_id = 0
		,@severity = 20
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000'

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev20AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev20AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 21 Error: Fatal Error in Database Process
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev21AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev21AlertName
		,@message_id = 0
		,@severity = 21
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev21AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev21AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 22 Error: Fatal Error Table Integrity Suspect
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev22AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev22AlertName
		,@message_id = 0
		,@severity = 22
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev22AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev22AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 23 Error: Fatal Error Database Integrity Suspect
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev23AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev23AlertName
		,@message_id = 0
		,@severity = 23
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev23AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev23AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 24 Error: Fatal Hardware Error
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev24AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev24AlertName
		,@message_id = 0
		,@severity = 24
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev24AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev24AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Sev 25 Error: Fatal Error
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Sev25AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Sev25AlertName
		,@message_id = 0
		,@severity = 25
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Sev25AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Sev25AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Error 823 Alert added on 8/11/2014
-- Error 823: Operating System Error
-- How to troubleshoot a Msg 823 error in SQL Server	
-- http://support.microsoft.com/kb/2015755
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error823AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error823AlertName
		,@message_id = 823
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error823AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error823AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Error 824 Alert added on 8/11/2014
-- Error 824: Logical consistency-based I/O error
-- How to troubleshoot Msg 824 in SQL Server
-- http://support.microsoft.com/kb/2015756
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error824AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error824AlertName
		,@message_id = 824
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error824AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error824AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Error 825: Read-Retry Required
-- How to troubleshoot Msg 825 (read retry) in SQL Server
-- http://support.microsoft.com/kb/2015757
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error825AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error825AlertName
		,@message_id = 825
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error825AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error825AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Error 832 Alert added on 10/30/2013
-- Error 832: Constant page has changed
-- http://www.sqlskills.com/blogs/paul/dont-confuse-error-823-and-error-832/
-- http://support.microsoft.com/kb/2015759
IF NOT EXISTS (
		SELECT name
		FROM msdb.dbo.sysalerts
		WHERE name = @Error832AlertName
		)
	EXEC msdb.dbo.sp_add_alert @name = @Error832AlertName
		,@message_id = 832
		,@severity = 0
		,@enabled = 1
		,@delay_between_responses = 900
		,@include_event_description_in = 1
		,@category_name = @CategoryName
		,@job_id = N'00000000-0000-0000-0000-000000000000';

-- Add a notification if it does not exist
IF NOT EXISTS (
		SELECT *
		FROM dbo.sysalerts AS sa
		INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
		WHERE sa.name = @Error832AlertName
		)
BEGIN
	EXEC msdb.dbo.sp_add_notification @alert_name = @Error832AlertName
		,@operator_name = @OperatorName
		,@notification_method = 1;
END

-- Memory Error Correction alerts added on 10/30/2013
-- Mitigation of RAM Hardware Errors	 		
-- When SQL Server 2012 Enterprise Edition is installed on a Windows 2012 operating system with hardware that supports bad memory diagnostics, 
-- you will notice new error messages like 854, 855, and 856 instead of the 832 errors that LazyWriter usually generates.
-- Error 854 is just informing you that your instance supports memory error correction
-- Using SQL Server in Windows 8 and Windows Server 2012 environments
-- http://support.microsoft.com/kb/2681562
-- Check for SQL Server 2012 or greater and Enterprise Edition
-- You also need Windows Server 2012 or greater, plus hardware that supports memory error correction
IF LEFT(CONVERT(CHAR(2), SERVERPROPERTY('ProductVersion')), 2) >= '11'
	AND SERVERPROPERTY('EngineEdition') = 3
BEGIN
	-- Error 855: Uncorrectable hardware memory corruption detected
	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @Error855AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @Error855AlertName
			,@message_id = 855
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 900
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000';

	-- Add a notification if it does not exist
	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @Error855AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @Error855AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END

	-- Error 856: SQL Server has detected hardware memory corruption, but has recovered the page
	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @Error856AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @Error856AlertName
			,@message_id = 856
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 900
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000';

	-- Add a notification if it does not exist
	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @Error856AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @Error856AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END
END

DECLARE @IsHadrEnabled AS SQL_VARIANT

SET @IsHadrEnabled = (
		SELECT SERVERPROPERTY('IsHadrEnabled')
		)

IF @IsHadrEnabled = 1
BEGIN
	--AG
	DECLARE @ErrorAG1480AlertName SYSNAME = @ServerName + N' Prod-Alert - Error 1480: AG Role Changed';
	DECLARE @ErrorAG35264AlertName SYSNAME = @ServerName + N' Prod-Alert - Error 35264: AG data Movement Suspended';
	DECLARE @ErrorAG35265AlertName SYSNAME = @ServerName + N' Prod-Alert - Error 35265: AG data Movement Resumed';
	DECLARE @ErrorAG41404AlertName SYSNAME = @ServerName + N' Prod-Alert - Error 41404: AG is offline';
	DECLARE @ErrorAG41405AlertName SYSNAME = @ServerName + N' Prod-Alert - Error 41405: AG not ready for Automatic failover';

	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @ErrorAG35264AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @ErrorAG35264AlertName
			,@message_id = 35264
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 600
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000'

	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @ErrorAG35264AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @ErrorAG35264AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END

	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @ErrorAG35265AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @ErrorAG35265AlertName
			,@message_id = 35265
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 600
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000'

	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @ErrorAG35265AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @ErrorAG35265AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END

	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @ErrorAG41404AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @ErrorAG41404AlertName
			,@message_id = 41404
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 600
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000'

	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @ErrorAG41404AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @ErrorAG41404AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END

	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @ErrorAG41405AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @ErrorAG41405AlertName
			,@message_id = 41405
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 600
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000'

	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @ErrorAG41405AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @ErrorAG41405AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END

	IF NOT EXISTS (
			SELECT name
			FROM msdb.dbo.sysalerts
			WHERE name = @ErrorAG1480AlertName
			)
		EXEC msdb.dbo.sp_add_alert @name = @ErrorAG1480AlertName
			,@message_id = 1480
			,@severity = 0
			,@enabled = 1
			,@delay_between_responses = 600
			,@include_event_description_in = 1
			,@category_name = @CategoryName
			,@job_id = N'00000000-0000-0000-0000-000000000000'

	-- Add a notification if it does not exist
	IF NOT EXISTS (
			SELECT *
			FROM dbo.sysalerts AS sa
			INNER JOIN dbo.sysnotifications AS sn ON sa.id = sn.alert_id
			WHERE sa.name = @ErrorAG1480AlertName
			)
	BEGIN
		EXEC msdb.dbo.sp_add_notification @alert_name = @ErrorAG1480AlertName
			,@operator_name = @OperatorName
			,@notification_method = 1;
	END
END
GO

Hope it helps !!