schema changes

Stairway icons Database Deployments

Stairway to Reliable Database Deployments Level 2 - Defining the Deployment Contract

  • Stairway Step

Level 2 formalizes the behavioral guarantees that a changeset must provide in order to be safely deployed and rolled back. It introduces the deployment contract, checkpoint semantics, and the structural scope of Create and Rollback scripts. Data changes are addressed through a dedicated Update mechanism, with clear boundaries and limitations. By the end of this level, a changeset becomes a predictable and well-defined unit that can be reasoned about independently of execution context.

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2026-06-11 (first published: )

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External Article

Allowing for manual checks and changes during database deployments

  • Article

SQL Change Automation enables users to make database changes to production safely and efficiently using PowerShell cmdlets, which can be integrated easily into any release management tool. This article will show you how to automate database deployments safely, by using SQL Change Automation from within PowerShell scripts, and how a deployment script for a release can be checked and amended as part of the process.

2020-06-15

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Question of the Day

BIT_COUNT I

In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data: 

UserID  UserPermissions
15
23
37
What is returned when I run this code: 
select bit_count(UserPermissions) as PermissionCount
from dbo.UserPermission
where UserID = 3;

See possible answers