PostgreSQL Query Rewriting Techniques The previous articles in this series covered performance problems you fix by adding indexes, restructuring joins, or tuning memory. This one is about the queries where the plan is "fine" — every node is doing something reasonable — but the query itself is asking the wrong question, producing unnecessarily large intermediate results or forcing the planner dow
Show HN: Let – Offline-first life events tracker (React Native, SQLite)
SQL is widely known for data querying and manipulation but systems do grow; data becomes larger; processes become repetitive and operations become sensitive. SQL has some features which enables it to be considered a fully fledged programming language. Some of the features which I discuss in this article are procedures, functions and transactions. Each of these concepts serve distinct purposes. Sto
Hi 👋, In this post we shall explore Bedrock's structured KB with this architecture: Upload CSVs to S3 > SNS Queue > Crawl data with Glue > Query with Redshift > Bedrock KB > Query with LLM. Let's do some of this with code. Let's get started. Clone the repo and switch to the project directory. git clone [email protected]:networkandcode/networkandcode.github.io.git cd structured-kb-demo/ Do a uv sync
Hey dev.to! Maksim here again, author of the previous article "From Idea to MVP: Building a Classified Platform in Serbia" about Rsale.net, a classified platform for Serbia. In that post I described the stack: Next.js 15 + React 19 + ASP.NET Core microservices + AI translation. A few months later, the frontend has been fully rewritten on SvelteKit 2 + Svelte 5 (runes). The Next.js codebase is gon
Subqueries vs. CTEs in SQL: A Practical Guide to Writing Cleaner, Smarter Queries Whether you're just getting comfortable with SQL or leveling up your data skills, two tools will come up again and again when working with complex queries: subqueries and Common Table Expressions (CTEs). They solve similar problems — breaking a complex query into manageable pieces — but they do it in different ways
If you're running a SvelteKit app on Cloudflare Pages and your content is publicly accessible, commodity scrapers will find it eventually. Here's the protection setup we use at Tested.gg - two layers, mostly free, minimal code. If your API is behind Cloudflare Service Bindings (not publicly exposed over HTTP), scrapers can only hit your SvelteKit Pages app. That's your entire attack surface. All p
In a previous post, I explored Codd's connection trap in PostgreSQL and MongoDB — the classic pitfall where joining two independent many-to-many relationships through a shared attribute produces spurious combinations that look like facts but aren't. The example followed Codd's 1970 suppliers–parts–projects model: we know which suppliers supply which parts, and which projects use which parts, but j