1. Make SQL Server to talk you!
Antonios Chatzipavlis
Software Architect , Development Evangelist, IT Consultant
MCT, MCITP, MCPD, MCSD, MCDBA, MCSA, MCTS, MCAD, MCP, OCA
MVP on SQL SERVER

2. Objectives
• SQL Server Agent Alert System
• Event Notifications
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3. What Is an Alert?
•
Predefined response to an event
•
Triggered by jobs, performance conditions, or
application log events
•
Can notify an operator or start a specified job
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4. Create an Alert
Use SQL Server Management Studio or “sp_add_alert”
Specify

Alert name

Condition (Event, WMI trigger, performance condition) that
triggers the alert

Response – notify an operator, start a job
EXEC dbo.sp_add_alert
@name = N'Test Alert',
@message_id = 55001, @severity = 0, @notification_message =
N'Error 55001 has occurred. The database will be backed up...',
@job_name = N'Back up the AdventureWorks Database' ;
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5. Responding to Alerts
Either
Launch a Job

Use an existing job

Create a new job
Or
Notify an Operator

Schedule responders for different parts of the day or week

E-mail, pager, or net send
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6. Using Alerts
DEMO
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7. Overview of Event Notifications
• Messages containing event data
DDL Events
Trace Events
DML Events
Database and Server Events
• Sent to an event processing service by using
Service Broker
A message type and contract are predefined
You must create a queue, a service, and a route
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8. Creating Event Notifications
1.
2.
3.
4.
Define the Event Notification
Specify the Scope
Specify the Event
Specify the Service
CREATE EVENT NOTIFICATION NotifyALTER_T1
ON DATABASE
FOR ALTER_TABLE
TO SERVICE '//Adventure-Works.com/ArchiveService' ,
'8140a771-3c4b-4479-8ac0-81008ab17984';
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9. Processing Event Notifications
1. Receive the message
2. Extract event data by using XQuery
DECLARE @cmd nvarchar(1000) NVARCHAR(256),
DECLARE
@messageTypeName
DECLARE @posttime nvarchar(24)
@messageBody XML
DECLARE @spid nvarchar(6)
;RECEIVE TOP(1)
@messageTypeName = message_type_name,
SET @messageBody = message_body
@cmd = @messagebody.value
('(/EVENT_INSTANCE/TSQLCommand/CommandText)[1]',
FROM dbo.NotifyQueue;
'nvarchar(100)')
SET @@ROWCOUNT = 0
IF @messagebody.value
('(/EVENT_INSTANCE/PostTime)[1]','nvarchar(24)')
RETURN
SET @spid = @messagebody.value
('(/EVENT_INSTANCE/SPID)[1]','nvarchar(6)')
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10. Managing Event Notifications
1. Viewing event notifications and queues
2. Deleting event notifications
SELECT name FROM sys.event_notifications
SELECT definition FROM sys.service_queues
DROP EVENT NOTIFICATION UpdateStats ON SERVER
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11. Implementing Event Notifications
DEMO
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12. Q&A
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13. My Blogs
http://www.autoexec.gr/blogs/antonch
http://www.dotnetzone.gr/cs/blogs/antonch
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14. Thank you
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