Data Analytics & Business Intelligence

Intro If you’ve built intraday quantitative strategies for US equities, you’ve almost...

Dash: Monitoreo del Fenómeno El Niño Hace unas semanas quería construir un dashboard...

What Is Data Masking? Data masking is a technique that replaces sensitive information with...

A real 2026 DE job required SQL, Spark, Kafka, Flink, dbt, Terraform, K8s, and LLM skills. Three staff engineers reviewed it. Zero qualified.

Introduction Every business relies on data, but not all data workloads are the same....

Your dashboard is lying to you - and we can prove it mathematically. The Pattern You've Seen...

If you work anywhere near spreadsheets and code, you'll eventually run into this exact situation:...

Prepare for your SQL interview with these essential questions and answers for beginners.

Pytest Fundamentals for Data Engineers Data engineering code is still software, and...

I've been building data2prompt for a few months now. It takes a data-heavy project (CSVs, SQL dumps,...

I have a personal stake in this one, so let me declare it up front. Apache Polaris was co-created by...

The most common architecture question I get in 2026 is no longer "should we use Iceberg." That one is...

If you want to know where Apache Iceberg is headed, do not read the press releases. Read the dev...

Here is a fact that surprises almost everyone the first time they hear it: in a data lakehouse,...

Every data engineer I talk to has the same story. Somewhere in their company, there is a table with a...

If you're building anything that touches Medicare Advantage risk adjustment, sooner or later you hit...

How we moved cross-region video analytics off SQLite onto DuckDB querying partitioned Parquet export

I recently built a Power BI dashboard analyzing sales and delivery performance for a car logistics...

Learn how to structure a data analyst resume for US jobs after graduating from a Chinese university. Includes before/after bullet rewrites, ATS-friendly formatt

Hey guys... I'm AshwinUdhayakannan, a guy trying to upskill in the world of information technology....

Los sitios financieros son minas de oro de datos tabulares. Precios de acciones, tenencias de ETFs,...

apache beam is the write-once-run-anywhere programming model that most senior data engineers meet the...

flink cdc is the ingest stack that quietly replaced Debezium + Kafka + a downstream Flink job on...

Introduction Real-time data pipelines power modern applications such as analytics...

If you've ever wondered how a shopping mall knows exactly how crowded its west wing is right now, or...

How to Recover Data from Failed Storage Arrays: A Complete Technical GuideStorage arrays—whether...

I've been thinking about how easy it is to trust the wrong metric, even when the data itself is...

Most "Debezium vs managed tool" articles get the question wrong. They frame it as a product bake-off,...

Battery energy storage systems are not one data source. A BESS site may include a BMS, PCS, EMS,...

Every large organization has the same quiet problem: the best information about risk doesn't live in...

Five US states — New York, Colorado, Pennsylvania, Oregon, and Connecticut — publish their entire business registries as open data with commercial use

I'm Heshan. I build data products. No VC, no team — just me, a lot of Playwright scripts, and...

The problem with two datasets A recent project of mine called for two things that are easy...

beginner has been there. You memorize services like: Amazon...

When we talk about data visualization and dashboards, enterprise tools like Tableau or PowerBI...

I built JSON Utility Kit as a small browser-based toolkit for everyday JSON tasks. The CSV to JSON...

AI-assisted coding is changing how data engineering teams work. A developer can now generate SQL,...

Introduction For the past few days I have been doing data cleaning using PowerBi 34...

TL;DR — I scored 525 Chinese social posts on two foreign-vs-domestic rivalries. Coffee: Starbucks...

Mastering Pandas — Part 1: Reading, Sorting & Displaying Data ...

Matomo is an open-source web analytics platform that keeps full ownership of visitor data on...

Plausible Analytics is an open-source, self-hosted web analytics tool that tracks traffic without...

Introduction Parametric and non-parametric statistical tests are used to analyze data. The...

Airflow is an open-source platform for programmatically authoring, scheduling, and monitoring...

Databricks Auto Upgrades introduces a revolutionary way to keep your lakehouse tables optimized and current, automating the adoption of advanced features to boo

Learn how to translate Chinese university project experience into US-style resume bullets for data engineering roles. Includes before/after examples, a 3-step r

SNOWFLAKE SQL INTERVIEW QUESTIONS – QUICK NOTES What is Snowflake? Snowflake is a cloud-based data...

Japan's qualified invoice system requires every invoice to carry a registration number (a "T"...