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Xavier Fok

Digital marketer and data analyst with 15+ years in advertising, content, and growth. Founder of DataResearchTools, based in Singapore. I write about AI tools, automation, and productivity for solopreneurs building real businesses without a team.

Python pandas tutorial for non-programmers (real examples)

May 6, 2026 by Xavier Fok

Python pandas tutorial for beginners. load a CSV, run pivot-style summaries, and clean and analyze data — using Google Colab with no installation required.

Categories Data Skills

how to use Python for business data analysis (beginner guide)

May 6, 2026 by Xavier Fok

Python for business data analysis — what it does better than Excel, how to set up Google Colab, five real business tasks, and a full worked example in 20 lines.

Categories Data Skills

best SQL learning platforms 2026: free and paid compared

May 6, 2026 by Xavier Fok

best SQL learning platforms in 2026 — free and paid compared. SQLZoo, Mode, DataCamp, LearnSQL, and Coursera compared for different goals and learning styles.

Categories Data Skills

SQL for beginners: learn the basics in one weekend

May 6, 2026 by Xavier Fok

SQL for beginners — learn the five commands that cover 80% of real queries, set up a free practice environment, and answer real business questions with SQL this weekend.

Categories Data Skills

how to clean messy data in Google Sheets (step-by-step)

May 6, 2026 by Xavier Fok

how to clean messy data in Google Sheets. step-by-step guide to removing duplicates, fixing inconsistent text, handling blanks, and running a pre-analysis checklist.

Categories Data Analysis

Google Sheets pivot tables: complete beginner guide 2026

May 6, 2026 by Xavier Fok

how to create a pivot table in Google Sheets, step by step. covers setup, calculated fields, and five business questions you can answer in under two minutes each.

Categories Data Analysis

Google Sheets formulas for data analysis: the 10 you actually need

May 6, 2026 by Xavier Fok

the most useful Google Sheets formulas for data analysis. VLOOKUP, SUMIF, QUERY, ARRAYFORMULA, and FILTER — explained with real business examples.

Categories Data Analysis

how to analyze data in Excel without being a data scientist

May 6, 2026 by Xavier Fok

how to analyze data in Excel for beginners. step-by-step guide to cleaning data, building pivot tables, creating charts, and using the formulas every analyst needs.

Categories Data Analysis

Excel vs Google Sheets for data analysis 2026: which one should you use

May 6, 2026 by Xavier Fok

Excel vs Google Sheets for data analysis in 2026. honest comparison of features, limits, and which one a solopreneur or small team actually needs.

Categories Data Analysis

How to Build a Simple Thought Leadership Engine as a Solopreneur

May 2, 2026 by Xavier Fok

learn how to build a simple thought leadership engine as a solopreneur. practical growth guide for solopreneurs.

Categories Growth
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