How to
Query Hash and Query Plan Hash Mapping
DMVs and Query Store store the query hash as binary(8), but Extended Events shows a number, and the two refuse to match. Here's how to map between them.
Notes from a TSQL trench
Database stuff,
with a side of memes.
Long-form notes on TSQL performance, Extended Events, Query Store and the tooling around them. Written from the trenches, not the slide deck.
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Latest posts
Scary Scalar Functions - Part One: Parallelism
Consultants hate me for this one weird trick. Because I'll be uncovering all the mess Scalar functions can cause in a series of articles.
Coding Standards (T-SQL Tuesday #151)
My T-SQL Tuesday #151 entry: the SQL habits I swear by, and the ones I'd ban from every codebase if I could.
New Extended Events in SQL Server 2022
SQL Server 2022's CTP has dropped. I diffed its Extended Events against 2019 and pulled out the few new ones worth a look.
Efficient Cheating at Lego Video Games
My daughter's LEGO game makes you re-enter every cheat on a clunky six-dial lock. So I built a TSQL solver to find the shortest path through all of them.
SQL Server Module Signing for Secure Cross-Database Access
I keep relearning how to set up secure cross-database access, so here's the reminder: a diagram plus a full follow-along example you can run yourself.
Why my way of writing SQL is superior
Semicolons, leading commas, single-letter aliases. Here is the SQL style everyone loves to argue about, and the practical reasons I refuse to budge.