Data Visualization

Master color in business dashboards without a design degree. Practical rules for palettes, contrast, accessibility, and the colors to avoid in 2026.

Pick the right chart every time. A practical decision guide with chart-vs-use-case matrix, real business examples, and the chart types to never use.

postgresql tutorial for analysts in 2026. learn the SQL features that matter for analysis: window functions, CTEs, dates, and JSON. no DBA experience required.

supabase tutorial for data analysis in 2026. set up a postgres database, load CSV data, run SQL queries, and connect to BI tools. no DBA required.

dbt tutorial for analysts in 2026. learn data transformation with SQL only, no engineering required. step-by-step setup, models, tests, and your first dbt project.

power query in Excel tutorial 2026. clean, shape, and combine data with no code. step-by-step beginner guide for analysts and small business owners.

tableau prep builder tutorial 2026. clean, shape, and join data visually with no code. step-by-step walkthrough for analysts moving from spreadsheets to BI.

hotjar vs microsoft clarity compared honestly in 2026. heatmaps, session recordings, free tier limits, and which to pick for your small business or SaaS site.

amplitude vs mixpanel in 2026 compared honestly for solopreneurs. free tier limits, learning curve, key features, pricing, and which to pick for your product.

mixpanel free tier tutorial 2026 for solopreneurs. set up event tracking, build funnels, and get useful product analytics without paying. complete walkthrough.