The DBScan algorithm tutorial

Learn to use the dbscan algorithm in Python.

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SQL ConstantCare® Population Report: Fall 2025

In this quarter’s update of our SQL ConstantCare® population report, showing how quickly (or slowly) folks adopt new versions of SQL Server, the data is very similar to last quarter

T-SQL in SQL Server 2025: Concatenating Strings

Like many of you, I have often put strings together (concatenation) with a simple arithmetical operator: +. We have a few other ways to put strings together, but in SQL Server 2025, we have a new operator that allows us to put strings together. This is the double pipe (||) operator. This article looks at […]

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IoT Meets OLTP: How to Handle Backfilling Challenges in Real-Time Systems

This is the true story of a 64-core SQL Server brought down by poor assumptions about its data. A clustered index designed for neat, sequential IoT inserts was overwhelmed when the real readings arrived late, out of order, and in bulk. The same risk lurks in any high-write system with unpredictable insert patterns. This article shows what can go wrong and how to avoid it.

Implementing PostgreSQL with Python for Real-Time Logging and Monitoring

Learn how you can create a logging module in Python that can be used to insert real-time records in a PostgreSQL database and display them on a dashboard.

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JSON_CONTAINS Function in SQL Server 2025

I have data coming into my SQL Server database as JSON. Before I start parsing it which is quite intensive, I need to check if some values are present in the JSON. Is there a function I can use to do this? Let’s see what the new JSON_CONTAINS function in SQL Server 2025 can do.

MySQL’s BLACKHOLE Storage Engine: The Odd Feature I Wish SQL Server Shipped With

Learn about a MySQL feature that could be useful in some scenarios for SQL Server.

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Unlocking the Power of FULL OUTER JOIN in SQL: Performance, Use Cases & Examples

Discover how the FULL OUTER JOIN in SQL can simplify queries, improve performance, and solve real-world data problems

T-SQL in SQL Server 2025: Substring Changes

This article takes a look at the changes in SQL Server 2025 to the SUBSTRING function.

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SQL Server CROSS APPLY and OUTER APPLY Helpful Examples

Microsoft introduced the APPLY operator in SQL Server 2005. Similar to a JOIN, it allows correlation between two table expressions. The key difference between the JOIN and APPLY operators is when you have a table-valued expression on the right side and want to evaluate it for each row from the left table expression. Since they produce similar results, when do you choose an APPLY versus a JOIN?