Draft category: Business Metrics. Strong first case study from your existing materials.
SQL, Python, Excel, Power BI
Practical data analysis guides for real business questions.
Learn how analysts clean messy data, write useful queries, build dashboards, and explain insights with confidence.
Monthly Revenue
Retention
42.8%
+6.4% vs last cohort
SQL Tasks
18
examples ready
Start here
Core learning paths
SQL
Queries, joins, windows, retention, cohorts, funnels.
PythonPandas cleaning, EDA, automation, charts, notebooks.
ExcelFormulas, pivots, dashboards, templates, reporting.
A/B TestingExperiment design, sample size, result analysis, reporting.
Business MetricsRetention, repurchase rate, conversion, funnels, diagnosis.
CareerInterview prep, learning paths, portfolios, analyst habits.
Featured guide
How to diagnose a drop in repurchase rate
A practical business metrics case study with SQL, an Excel diagnosis template, a segment chart, and a downloadable checklist.
Read the guide- Define the business question
- Inspect and clean the data
- Calculate the right metrics
- Explain the result clearly
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Featured articles
Draft category: A/B Testing. Good fit for an article plus downloadable template.
Draft category: A/B Testing. Useful for tutorials, portfolios, and reporting templates.