Modelling Database Creation with the Model System Database in SQL Server

Modelling Database Creation with the Model System Database in SQL Server

The Model database in SQL Server is used as the template for all the user databases that are created on a SQL Serve instance. Most of the times we do not modify the Model database however there are cases where it might come in handy.

For example consider the following scenario: For audit purposes, you want to set your SQL Server instance, each time a user database is created, to automatically create an audit-related table as well as a relevant stored procedure that will allow each application that uses a database to be able to store in a table (in each database) the log-in and log-out times for each user.

To do this, we can create the relevant table and stored procedure in the Model database:

USE [model]

CREATE TABLE [dbo].[AuditLog](
[userID] [int] NOT NULL,
[loginTime] [datetime] NOT NULL,
[logoutTime] [datetime] NOT NULL

  @userID int,
  @loginTime datetime,
  @logoutTime datetime
  INSERT INTO dbo.AuditLog
VALUES (@userID, @loginTime, @logoutTime)

Let’s take a look at the Model database:

Figure 1: The Model database after adding the table and stored procedure.

OK, so we have added the table and stored procedure in the Model database. Now let’s create three empty sample databases and check if the same tables and stored procedures are created automatically upon their creation:


Time to check the three newly created databases and see if the “AuditLog” table and “logUser” stored procedures were automatically created:
Figure 2: SampleDB1
Figure 3: SampleDB2

Figure 4: SampleDB3

As you can see, all three databases were created fully based on the (modified) Model system database, thus the “AuditLog” table and “logUser” stored procedure were automatically created.

You can use the Model database for other things as well, as the above was just a simple example. However always have in mind when creating objects in the Model database that they will be automatically created for all user databases that will be created on that instance so be careful!

For more info on the Model database, please visit the following MSDN Library link.
P.S. Many thanks to my buddy Nakis for this great discussion. Always a pleasure man! 🙂

Artemakis Artemiou
Artemakis Artemiou is a Senior SQL Server and Software Architect, Author, and a 9 Times Microsoft Data Platform MVP (2009-2018). He has over 15 years of experience in the IT industry in various roles. Artemakis is the founder of SQLNetHub and Artemakis is the creator of the well-known software tools Snippets Generator and DBA Security Advisor. Also, he is the author of many eBooks on SQL Server. Artemakis currently serves as the President of the Cyprus .NET User Group (CDNUG) and the International .NET Association Country Leader for Cyprus (INETA). Artemakis's official website can be found at