Data Analytics & Business Intelligence

I made Solvedge — a Codeforces performance dashboard I built Solvedge — a web dashboard...

SQL is the backbone of data analysis. While basic SQL allows you to query and filter data, advanced...

Is a data science bootcamp worth it? A practical ROI framework, skills checklist, and a quick baseline model example to decide in 2026.

Is a data science bootcamp worth it in 2026? A practical ROI checklist, red flags, a mini-project test, and smarter online learning alternatives.

Is a data science bootcamp worth it in 2026? A practical, opinionated guide to bootcamps vs self-paced platforms, plus a quick readiness test.

By John Leslie Prediction markets are booming. Polymarket alone processes billions in volume. But a...

NumPy is for numbers. Pure numbers, same type, organized in grids. Fast, powerful, no labels. Real...

⚔️ Jupyter Notebook vs Google Colab 🔹 1. Setup & Installation ...

Manual polling is an anti-pattern; stream the truth directly from the source. What We're...

Most analytical work relies on a small set of core calculations. Master these 10 operations in R and...

ByteDance data engineering interview questions (often discussed alongside TikTok-aligned or...

Most people searching for free stock data end up in the same loop. They find Yahoo Finance. The...

A practical guide to cohort analysis tools: what cohorts reveal, must-have features, a SQL retention example, and when to use Mixpanel, Amplitude, or PostH

Looking for Segment alternatives? Compare PostHog, Mixpanel, Amplitude, Hotjar, and FullStory with tradeoffs, plus a lean tracking spec example.

A practical guide to product analytics tools: categories, selection criteria, real comparisons (mixpanel, amplitude, hotjar, fullstory, PostHog) + code.

Looking for GA4 alternatives? Compare Amplitude, mixpanel, Hotjar, FullStory, and PostHog with a pragmatic checklist and a reusable tracking example.

PostHog self-hosted review with real ops tradeoffs, comparisons vs Mixpanel/Amplitude/Hotjar/FullStory, and a practical event-capture snippet.

Introduction. Starting your journey with SQL can feel like staring at a massive wall of...

Mixpanel vs Amplitude in 2026: real differences in instrumentation, governance, workflows, and how to choose for fast insights and reliable retention.

1. The Hook: Industrial Data Entropy In standard academic theory, data sets are inherently...

1. El Gancho: La Entropía de los Datos Industriales En la teoría académica, los datos...

Measure the height of every adult in your city. Plot how many people are at each height. Short on...

I built a signal intelligence system that scrapes Reddit, Hacker News, Google Trends, patent filings,...

How to manage CV variants without spreadsheet drift (manual tailoring burnout) Publish a...

Disclaimer: This guide covers extracting publicly accessible data. Always review a site's robots.txt...

In today’s digital world, data is everywhere. From online shopping to social media and banking...

The Reality of Real‑World Data Over the past few days, we have been working with perfect, pristine...

I have used libraries like Chart.js and D3.js in a few projects, and they are great when you are...

Modern data platforms are no longer simple pipelines—they are distributed ecosystems. Data moves...

Introduction Databricks has become a core platform for data engineering, analytics, and...

When GA4 'Direct / (none)' grows past 30%, it almost never means brand awareness. It means your measurement is leaking. Here are the 5 causes and how 8 out of 1

Before you train a single model, you need to understand your data. Not a vague understanding. A...

Introduction Structured Query Language (SQL) is the standard language for managing and...

Web3 cohort analysis helps web3 product and marketing teams group users by shared attributes to track engagement, improve retention, and uncover valuable produc

Formo helps crypto and DeFi teams drive growth with analytics and attribution designed for onchain growth. Leading onchain apps use Formo's end-to-end analytics

Plausible vs Fathom Analytics compared: data model, privacy, implementation, and when to add PostHog/Mixpanel. Pick the right lightweight stack.

Learn how to evaluate cohort analysis tools, avoid misleading averages, and run a practical cohort workflow with a SQL example for retention.

Segment alternatives explained: pick the right analytics stack by use case (product analytics, session replay, warehouse-first) with a TS event contract ex

A practical guide to product analytics tools: how to evaluate platforms, avoid event soup, compare Mixpanel/Amplitude/PostHog, and track events right.

Published on Dev.to by Prithvi S If you've worked with petabyte-scale data lakes, you've felt the...

Brazil has one of the most complex crime landscapes in Latin America — but getting clean, queryable...

Introduction No matter what type of Artificial Intelligence workload your business implements, it...

Introduction When you first start working with databases, it can feel like you’re looking...

EdTech products run across very different user journeys, from course discovery to live lessons and assignment uploads. This guide shows which performance metric

Recently I passed the Databricks Certified Professional Data Engineer exam and the Databricks...

Structured JSON logs are easy to produce and hard to analyze at scale. They carry useful context, but...

Az előző blogbejegyzésemben A Cramer-féle asszociációs együtthatót mutattam be egy egyszerű példán...

Q1 2026 numbers are in. 78,557 cuts, nearly half officially attributed to AI. Here's what data engineers actually need to worry about.