Test OPTION (FORCE ORDER) against real join plans, see when fixed table order helps or hurts, and apply a reversible Query Store hint.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
Relational Database in Big Data: Still at the Center
The relational database in big data projects is still the system of record, and most analytics platforms copy their core business data from it. This post shows what a relational database does well, where it sits in a modern platform, and how the SQL Server 2025 json type adds a flexible schema next to ordinary tables.
Columnar File Formats: Why Parquet Changed Big Data
Columnar file formats store a table one column at a time, so a report reads and compresses only the columns it needs. This post compares rows and columns on a tiny table, explains how a Parquet file is laid out, and measures the size difference in SQL Server 2025.
MapReduce Explained: Map, Shuffle and Reduce Step by Step
MapReduce splits a big job into many small map tasks, moves the results by key in a shuffle, and adds them up in reduce tasks. This post walks one word count through every step, with a recreated diagram and the same idea in T-SQL.
Horizontal and Vertical Scaling for Databases
Horizontal and vertical scaling solve different SQL Server capacity problems; compare larger machines, additional nodes, and the costs each brings.
How Apache Spark Works: Driver, Executors and Partitions
How Apache Spark works comes down to a driver that plans the job, executors that run it, and data cut into partitions. This post follows one sales total through two stages and a shuffle, and compares it with a parallel plan in SQL Server.
What Is NoSQL? Data Models, the CAP Theorem and Trade-Offs
What Is NoSQL? It is a family of data models other than the classic table, each built for one kind of access pattern. This post covers the four data models, eventual consistency and the CAP theorem in plain words, and how to choose.
SQL Server slow? Let's fix it together in about four hours.
In my Comprehensive Database Performance Health Check, you share your screen, I guide you, and we fix your biggest performance troublemakers. No passwords. No remote access.
You keep every script, and the know-how to fix it yourself next time.
Want your whole team to learn it?
My Practical Workshop has no PowerPoint, just live demos. My AI Enablement Workshop shows your team where AI saves hours, and where it quietly costs them.
Over 400 customers have worked with me this way, and not one shared a password. See all consulting options.