Roland Wenzlofsky
The Great Fragmentation — How One Job Became Thirty Titles
In my last post, I described a time when five people could build and maintain an entire data warehouse. That era ended not because the…
Data Warehouse of Horrors: 20 Years of Watching Smart People Build Stupid Things
Chapter 1: When Data Warehousing Was Still Fun
The 15-Year Detour: How the Data Industry Spent Billions Reinventing SQL
Somewhere around 2020, the data world quietly arrived at a conclusion that Teradata engineers could have told you in 1984: SQL on a massively parallel architecture is a pretty good way to process large volumes of data.
The path to get there was anything but quiet. It involved billions in
From 12,400 Partitions to 3: How Snowflake’s Four Access Paths Actually Work
If you come from Teradata, Oracle, or SQL Server, the first thing you learn about Snowflake stops you cold: there are no indexes on…
How Survival Instinct Is Reshaping the Data Warehouse
Every data platform eventually faces the same question: how do you serve both the analyst running a full-table scan across billions of rows…
Seven Table Types, Five Serverless Meters, and Zero DBAs: Snowflake’s Quiet Evolution
Snowflake in 2026 is not the platform you onboarded onto. The question is whether your team has noticed.
The 15-Year Detour: How the Data Industry Spent Billions Reinventing SQL
Somewhere around 2020, the data world quietly arrived at a conclusion that Teradata engineers could have told you in 1984: SQL on a…
Why Two Identical Teradata Migrations Produce Wildly Different Snowflake Costs
Migration success stories are everywhere. A quick search reveals case studies of companies that moved from Teradata to Snowflake and…
The Medallion Architecture Is Not New. We Just Called It Something Else.
Why data warehouse professionals have been doing “bronze, silver, gold” for over 20 years.