Track changes to SQL Server 2000 and 2005 with one simple utility

The solution:
There are a few options to achieve my goal in SQL Server 2005, such as DDL triggers and event notifications. But SQL Server 2000 is more limited. To achieve my goal in both environments, I had to program a small utility that could run once a day or a few times a day, monitor changes in the respective system tables and send a message if changes are, in fact, detected. In order for that to work, SQL Mail (SQL 2000) or Database Mail (SQL 2005) must be configured already. I created a sp_send_dbmail stored procedure on my SQL 2000 instances that simply executes the xp_smtp_sendmail stored procedure.

Here are the example scripts I use in order to receive notification when new objects are created in my SQL Server instance. You can use these same scripts for modifications and deletions of the corresponding server objects:

1. New job:

   A trigger can be created on the sysjobs table in the msdb database, so you don't need a daily job for that matter:

   
   (Click on image to download script)

   Tips on monitoring SQL Server: Monitoring server disk space in SQL Server Stored procedure to monitor long-running jobs in SQL 2000 Screencast: SQL Server PerfMon counters for Windows OS

   Note: Triggers on system tables, such as sysjobs, are not always recommended since there is a danger that when the SQL Server version is upgraded, these triggers will be dropped or will stop functioning. Be sure to document these triggers and keep their source code for your successors and team members.

   For the other system tables in the master database (such as syslogins and sysdatabases), it's impossible to create triggers, so you should take another approach.

2. New login:

   I create a table in tempdb holding the login names from the last time the job was executed. Every time it executes, I compare the contents of this table with syslogins and send a message with the new logins, if there are any. If the content of the table changed, I update the one in tempdb accordingly. It is better to create the table in a DBA database instead of in tempdb -- this way the table will not be dropped when SQL Server service is restarted for any reason. The following script should be executed every period of time (such as once a day):

   
   (Click on image to download script)

3. New database:

   I do the same as I did with the new logins:

   
   (Click on image to download script)

A more realistic solution:
You can apply the sample code – except for the trigger that will execute anyway – when a new job is added from a central location by executing it as remote stored procedures.

For example, create the following on server_A, server_B and server_C:

(Click on image to download script)

And run the following from server D (which is a central server) using Linked Servers:

exec Server_A.master.dbo.spDBA_NewDatabaseNotification
exec Server_B.master.dbo.spDBA_NewDatabaseNotification
exec Server_C.master.dbo.spDBA_NewDatabaseNotification
exec Server_D.master.dbo.spDBA_NewDatabaseNotification

Conclusion:
A simple way to receive notification about changes in your SQL Server objects, such as logins, databases and jobs, when you have both SQL Server 2000 and SQL Server 2005 is to monitor the delta of the system tables that hold the object's information or have a trigger on the object's table when it's possible.

ABOUT THE AUTHOR:

Michelle Gutzait works as a principal database consultant for Victrix, a Montreal-based IT consulting firm specializing in information security, infrastructure, communication networks and applicative solutions and collaboration. Gutzait has been involved in IT for 20 years as a developer, business analyst and database consultant. For the past 10 years, she has worked exclusively with SQL Server, including SQL infrastructure and database design, performance tuning, security, high availability, disaster recovery, VLDBs, replication, T-SQL coding, DTS/SSIS packages, administrative and infrastructure tools development and reporting services. Copyright 2008 TechTarget