Joe Celko


Stairway to Database Design

Stairway to Database Design Level 2: Domains, Constraints and Defaults

A clear understanding of SQL Data Types and domains is a fundamental requirement for the Database Developer, but it is not elementary. If you select the most appropriate data type, it can sidestep a variety of errors. Furthermore, if you then define the data domains as exactly as possible via constraints, you can catch a variety of those problems that would otherwise bedevil the work of the application programmer.

You rated this post out of 5. Change rating

2016-06-01 (first published: )

28,221 reads

Stairway to Database Design

Stairway to Database Design Level 1: Data Elements

Before you start to think about your database schema or tables, you need to consider your data: the type of data it is, the scale you use for values. It needs to be unique, precise and unambiguous. Then you need to name it in such a way that it can be generally understood. Joe Celko explains...

You rated this post out of 5. Change rating

2013-07-03 (first published: )

39,723 reads

Blogs

Monday Monitor Tips: Configuring Access to the MCP Server

By

I have been experimenting with MCP servers in a few ways, including the Redgate...

The GO Barrier: Why SSMS Multi-Server Query Waits for the Slowest Connection

By

I deployed a schema change to 30 servers using multi-server query and deploy-at-low-priority. Small...

10 Things I Hate About Fabric Deployment Pipelines— And Some Alternatives

By

Fabric deployment pipelines look like they solve CI/CD for Fabric content, especially for people...

Read the latest Blogs

Forums

A Challenge of Our Knowledge

By Steve Jones - SSC Editor

Comments posted to this topic are about the item A Challenge of Our Knowledge

The memory toll of VARCHAR(MAX) in SQL Server

By sabyda

Comments posted to this topic are about the item The memory toll of VARCHAR(MAX)...

Transaction Log Truncation

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Transaction Log Truncation

Visit the forum

Question of the Day

Transaction Log Truncation

In SQL Server 2025, where can I find information about items that prevent or delay the transaction log truncation?

See possible answers