SQLite WAL Debug, pgstream v1.1.0, & Postgres Scaling Retrospective
SQLite WAL Debug, pgstream v1.1.0, & Postgres Scaling Retrospective Today's Highlights This week's database highlights include a deep dive into SQ…
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Discovering PII Inside InterSystems IRIS
Data privacy regulations such as GDPR, LGPD, and HIPAA demand that organizations know exactly where Personally Identifiable Information (PII) lives in…
The Deep Mechanics of Online Bulk Deletion in PostgreSQL
MVCC, WAL, vacuum, and replication slots under sustained delete load - and how to delete billions of rows without your database noticing Most "how to …
Top 12 SQL Interview Problems for Data Engineers, With Answers
I've been on both sides of the SQL interview table somewhere around 20 times in a single job search. The pattern is always the same: candidates know S…
Database Management Systems for Beginners: Learn SQL, Tables, Queries, and Data Design.
I often see beginners struggle with databases because most resources either jump straight into SQL syntax or spend too much time on theory. Over the p…
Stop Hiding SQL Behind Your ORM: jOOQ, JPA, and JDBC Under Production Load
Most persistence debates in Java are framed incorrectly. The question is not: Should we use JPA, jOOQ, or JDBC? The real question is: Is this part of …
I built an AI-personalized news bot that runs on a single SQLite file — architecture and everything that broke
I built an AI-personalized news bot that runs on a single SQLite file — architecture and everything that broke TL;DR — @futur_e_news_bot . A bilingual…
From Individual Sandbox to Multiplayer: Group Rooms, Linked Servers, and Gamification in T-SQL Online
We just deployed a major update to our SQL Server web sandbox, moving from an individual tool to a collaborative environment: ✅ Group Rooms (Beta): …
A practical SQL query tuning playbook: execution plans, joins, indexes, and the traps
SQL tuning is the process of making a database query run faster and cheaper — cutting response time while minimizing the system resources it burns. He…
I built a free SQL practice game where you work at a fictional Singapore bank
I've been frustrated with SQL learning resources for a while. Most are either: Dry reference docs Toy exercises with no context ("SELECT * FROM employ…
DuckDB Integrates Lance Lakehouse; SQLite CVE Fix; Postgres 19 Beta on K8s
DuckDB Integrates Lance Lakehouse; SQLite CVE Fix; Postgres 19 Beta on K8s Today's Highlights This week, DuckDB introduces integrated vector and hybri…
I got tired of writing the same history table boilerplate, so I built a Postgres extension
There's this problem I kept running into - first during my internship, then again on a freelance project I picked up afterward. Both of them used Post…
When Text Becomes Code: Defending LLM–Database Integrations from Prompt Injection
When Text Becomes Code: Securing LLM–Database Integrations When you connect a large language model to your production data, you’re no longer just ship…
Less boilerplate than raw SQL, less magic than ORM: generating PostgreSQL queries from Go structs
I like writing SQL manually in Go. Especially with pgx or database/sql, it gives you explicit control over what happens: no hidden queries, no entity …
🧠 Mastering pinecone fastapi semantic search tutorial
🚀 Overview — Why Semantic Search Matters Semantic search surpasses simple keyword matching because embeddings place texts in a high‑dimensional vector…
The Data Engineering Take-Home Assessment: How to Turn a 4-Hour Test Into a Job Offer
Most candidates treat the take-home assessment as a coding test. It is not. It is a professional communication test that happens to include coding. Th…
I built a release intelligence agent in 4 days with Coral, Groq, and Claude Code. Here's the exact route
5 days. Solo. First hackathon. One dashboard that tells you whether to ship. This is not a polished retrospective. This is the actual route I took — w…
Backend Basics for Frontend Engineers: Dive into SQL and APIs with Node.js
If you've spent most of your career building beautiful UIs, managing state, and wrestling with CSS, the backend can feel like someone else's problem. …
Before SQL, We Had to Tell Computers Everything. Then One Idea Changed That Forever.
Here's something most SQL tutorials skip entirely: SQL wasn't just a new syntax. It was a new way of thinking . Before SQL existed, most systems were …
SiteRows example #1:
Hello world! I'm starting this series of examples/use-cases of siterows.com, the new app I recently built. Without further ado... 🔹 Quick reminder of …
Vector‑native RAG on Oracle: embeddings, HNSW/IVF, and hybrid search under database governance
Key Takeaways Storing vectors in an Oracle VECTOR column alongside content, metadata, and provenance means retrieval happens inside the database. Exis…
How I Built an End-to-End HR Attrition Dashboard Using MySQL & Power BI
Losing great employees is incredibly expensive for businesses. To show potential employers how I tackle real-world business problems using data engine…
DuckDB 1.5.3 Adds Quack Client-Server, SQLite Gets Cypher Graph Extension
DuckDB 1.5.3 Adds Quack Client-Server, SQLite Gets Cypher Graph Extension Today's Highlights This week, DuckDB releases version 1.5.3 with the Quack c…
# I built a type-safe SQL library for Bun — no ORM, no codegen, just SQL (using Claude Code)
I've been using Bun for a while and kept running into the same problem: every SQL library either requires Node.js internals, leans heavily on an ORM a…
Stop Naming Your Healthcare Columns Wrong — ISO-11179 Explained
If you've ever inherited a healthcare database with columns named DOB , PatientID , or CLAIM_NUMBER — this guide is for you. Healthcare data engineeri…
🎮 The SQL Arcade : No Boring Textbooks Allowed
Let's be honest: staring at a dry spreadsheet or a thick textbook is probably the worst way to try to learn SQL. It doesn't have to be a grind. If you…
Six SQL patterns I use to catch transaction fraud
Quick disclaimer: I do data work on a program-integrity team. Examples below use generic transaction tables and made-up scenarios. Nothing here comes …
Your AI database agent does not know what revenue means
The fastest way to get a wrong answer from an AI database agent is to ask a simple business question. What was revenue last month? That sounds easy. T…
Design review: Live SQL queries on PostgreSQL
I’ve been experimenting with something I’ve wanted for a long time: "live mode" in SQL. Today, this is now possible on PostgreSQL: const result = awai…
SQLite Corruption in Sandboxes, PostgreSQL Caching, & Rust DB Proxy Architecture
SQLite Corruption in Sandboxes, PostgreSQL Caching, & Rust DB Proxy Architecture Today's Highlights This week's highlights feature a deep dive int…