Data Analytics & Business Intelligence

Most engineers reach for Python first. Wrong instinct. I've spent 17 years inside other people's...

Ever wonder how those "how tall will my child be?" calculators actually work? They're not magic — but...

In the ever-evolving landscape of data management, ensuring the security and integrity of information...

A practical guide to building real-time metrics dashboards on top of a relational database — pre-aggregation, materialized views, LISTEN/NOTIFY, and the gotchas

Wikipédia est la source la plus courante de données tabulaires web. C'est aussi un champ de mines de...

In the field of data science and analytics, raw data is rarely perfect. Real-world datasets often...

The most dangerous myth in modern data engineering is that "Text-to-SQL is a solved problem." Every...

I spent a good two weeks last quarter building an invoice extraction pipeline for our accounting...

Your Pipeline Is 23.2h Behind: Catching Stock Market Sentiment Leads with Pulsebit We...

This is the narrated version of our free, interactive Data Engineer Roadmap. Same areas, same order,...

If you've just started your journey in data analytics, this guide walks you through how to use...

Financial charts often combine metrics that live on completely different scales. For...

In the hyper-accelerated world of software development, where programming languages often have the...

Your Pipeline Is 11.0h Behind: Catching Agriculture Sentiment Leads with Pulsebit We just uncovered...

I recently launched a rules-based macro stress monitor for African and LatAm economies on Apify. It...

Every small mobile game team eventually runs into the same question: Why did ad revenue change...

A practical guide covering airbyte vs n8n vs temporal for api data pipelines.

When working with ClickHouse®, writing a query is usually straightforward. Writing an efficient...

📊 Every day, billions of pieces of data are generated around the world. But raw data alone doesn't...

Traditional databases just can't keep up with high concurrency and low latency at the same time. The...

If you're building a modern data stack that requires either high-throughput transaction processing or...

Research: Mapping SQLite result columns back to their source `table.column` It would be neat if arbitrary SQL queries in Datasette could be rendered with additi

Pandas and polars pipelines fail silently — a merge adds nulls, a filter drops rows, a cast changes dtypes, and nothing crashes. Here's how to find which step d

Before I thought Excel was just something accountants use to make tables look neat. I was wrong —...

Recently, I completed my first full Data Engineering project: building an end-to-end ETL pipeline...

A practical, honest guide to building a LinkedIn profile scraper: why there's no public API, how public pages embed JSON-LD, and the legal reality.

Your Pipeline Is 28.0h Behind: Catching Climate Sentiment Leads with Pulsebit We just...

A Titanic notebook will not get you hired. Here is what a real data science project shows, handling messy data, avoiding leakage, honest validation, and a clear

ClickHouse® offers powerful query optimization features such as Projections and Data Skipping Indexes...

When I joined the data team at an automotive parts company, the inventory query everyone relied on...

Emergency procurement was happening 23 times per month at the automotive parts company where I work....

Postgres is the right default until it isn't. Five questions that tell you when to reach for something else, before you're locked in.

Transactional outbox vs Debezium-style CDC. Coupling, ordering, ops cost, a decision matrix, and the hybrid path most teams end up running.

Source: Fundamentals of Data Engineering by Joe Reis and Matt Housley, published by O'Reilly...

Last week a JSON-to-Excel tool quietly changed my data and I almost shipped it to a client. I pasted...

Microsoft Excel is far more than just a grid of rows and columns, it is the fundamental language of...

More Than Just a Spreadsheet When most people hear "Excel," they picture a grid of cells filled with...

How we replaced notebooks and a warehouse with DuckDB for ad-hoc video watch-time analytics on parti

Here is an uncomfortable fact about the digital age: it may leave behind less durable evidence of...

How to fetch JSON from any REST API in Google Sheets using Apps Script — parse the response, map objects to rows, and write a rectangular 2D array wit

Github Repository Hi community, I've built a open source PDF to Excel Converter and let me tell you...

Daily learning part thirty-two. I started today at 17:00. I started with SQL and completed 10...

All numbers below are chain-derived via eth_getLogs against public RPCs. Nothing is self-reported,...

Explore Apache Iceberg metadata hierarchy, schema evolution, hidden partitioning, and concurrency model.

GBase 8a fully supports OLAP window functions, making it a powerful gbase database for analytical...

When people first start learning ClickHouse®, they usually focus on SQL queries, table engines, and...

Lower compute spend by optimizing queries: clustering keys, materialized views, predicate pushdown and scan reduction for Snowflake, BigQuery, Redshif

apache pulsar vs kafka is the messaging question that every senior data engineer has answered twice...