The Database Doctor
Musing about Databases

Tag: tpch

Cover image for TPC-H series - TPC-H Query 3 - Join Ordering and Heap Sorting
TPC-H series - TPC-H Query 3 - Join Ordering and Heap Sorting

Reading Time: 7 min, Date: 9/10/2025

I want to teach you an important skill that will serve your well as a database specialist. One blog entry is not going to be enough, but here is my goal: When you look at an SQL query in the you...

Cover image for TPC series - TPC-H Query 2 and 17 - De-correlation
TPC series - TPC-H Query 2 and 17 - De-correlation

Reading Time: 9 min, Date: 8/29/2025

The great promise databases make to programmers is: "Tell me what you want and I will figure out the fastest way to do it." A database is a computer science engine — it knows and...

Cover image for Introducing the TPC series - TPC-H Query 1: Column Storage and Local Aggregation
Introducing the TPC series - TPC-H Query 1: Column Storage and Local Aggregation

Reading Time: 9 min, Date: 7/14/2025

After the wonderful feedback on the previous blog about Iceberg - it is now time to switch gears. Databases are more than row storage engines. They are algorithm machines, helping that...