The short answer: in the real world, only the first column works. When SQL Server needs data about the second column, it builds its own stats on that column instead (assuming they don’t already exist), and uses those two statistics together – but they’re not really correlated.
2026-04-29
Learn how the JSON_ARRAYAGG() function works in SQL Server 2025.
2026-04-27
4,183 reads
As a Microsoft Fabric Administrator, you have the responsibility to manage all the Microsoft Enterprise gateways installed and deployed across your entire data estate.
2026-04-27
Learn about using SQL Server to support AI-enhanced search queries with the Relational Embedding Retrieval Pattern (RERP).
2026-04-24
1,919 reads
A dangerous privilege-escalation path exists in SQL Server when cross-database ownership chaining, system database defaults, and overly permissive permissions are combined.
2026-04-24
A SQL Server Agent job can start other jobs. Writing jobs this way makes it easy to compartmentalize jobs: start a “child” job only when the “parent” reaches a certain step. Finding these steps can be challenging. There is no field or property in sysjobs or its associated tables to help find child jobs.
2026-04-22
Power BI DirectQuery can quietly overwhelm your SQL Server. Unlike Import mode, DirectQuery sends live T-SQL for every visual interaction, multiplying queries and placing heavy analytical load on the database. This article explains how to identify the worst offending DirectQuery queries, why the generated SQL is often inefficient, and what you can do from the database side, including indexing, Query Store, and reporting views, to improve performance. It also outlines practical changes on the Power BI side and when DirectQuery is simply the wrong architectural choice.
2026-04-20
4,807 reads
Pat Wright details how to plan cloud migration with minimal downtime. Learn key cutover strategies, testing methods, and critical questions to avoid data loss and system failure.
2026-04-20
2026-04-17
1,432 reads
I’m sure I’m not alone when I say, sometimes I get sidetracked. In this particular instance, I hadn’t intended to start learning about User-Defined Types (UDT) in PostgreSQL – I just wanted to test a behavior that involved creating a UDT. But, once I started reading, I was hooked. I mean, four distinct UDTs with different behaviors? That’s pretty cool. Let’s get into it.
2026-04-17
Programmatic Tool Calling with the Claude SDK Every morning somebody on the team runs the...
By Steve Jones
mauerbauertraurigkeit – n. inexplicable urge to push people away, even close friends whose company...
By Brian Kelley
Pinal Dave wrote up his methodology for what to do when you discover bad...
Via Wa:628218200174 Alamat Wisma Asia, Jl. Letjen S. Parman No.Kav. 79, RT.4/RW.9, Kota Bambu...
Via Wa:628218200174 Alamat. Jl. Melawai Raya No.Blok B, RT.7/RW.5, Kramat Pela, Kec. Kby. Baru,...
In SQL Server 2025, I run this code:
select bit_count('A')
What is returned? See possible answers