Datakhi Blog
News, tips and expertise on data
Data Engineer vs Data Analyst: What Are the Differences in 2026?
Understanding the differences between Data Engineer and Data Analyst roles: missions, skills, salaries and career paths. A guide to choosing the right data career for you.
Recommendation Systems: Which Database Architecture Should You Choose?
Graph DB vs Vector DB comparison for recommendation systems. Real-world experience with PostgreSQL and pgvector on an eco-friendly fashion aggregator.
Predicting Customer Traffic with Machine Learning
How to predict customer traffic to better plan teams and inventory. Pragmatic approach with XGBoost, weather and calendar data. Applicable to restaurants, retail, museums, leisure.
Switching to Open Source: How Does It Actually Work?
Integrating open source data infrastructure at a client site: steps, prerequisites and support. Simpler than you might think.
Microsoft Fabric in 2025: Complete Guide to New Features and Capabilities
Discover all the new features of Microsoft Fabric in 2025: Copilot for everyone, AI Data Agents, Real-Time Intelligence, Osmos acquisition and more. Complete guide to modernizing your data stack.
Self-Hosted File Storage: Understanding Object Storage and Its Alternatives
What is object storage? Why has S3 become a standard? Overview of self-hosted solutions with a focus on Garage, a European alternative.
Building a Sovereign Data Platform: Architecture and Lessons Learned
Learn how to build a sovereign data platform with MinIO, PostgreSQL, Airflow and Kubernetes. Complete architecture, technical choices and best practices for private cloud.
Data Quality: The Practical Guide to Reliable Data in 2025
What is Data Quality? Discover the 6 dimensions of data quality, best practices, market tools and how to implement an effective DQM strategy.
Becoming a Data Analyst in 2025: Training, Skills and Salaries in France
Complete guide to becoming a Data Analyst in 2025. Discover required skills (SQL, Python, Power BI), training, salaries from €35k to €75k and career prospects in data.
ETL vs ELT in 2025: Which Approach for Your Data Warehouse?
Understanding the differences between ETL and ELT in 2025. Pros, cons, use cases and guide to choosing the right approach for your modern data architecture.
Power BI vs Tableau in 2025: Which Data Visualization Tool Should You Choose?
Complete Power BI vs Tableau comparison in 2025: features, pricing, ease of use, AI and performance. Guide to choosing the best Business Intelligence tool.
PL-300 Power BI Certification: Complete 2025 Preparation Guide
Prepare and pass the Microsoft PL-300 Power BI Data Analyst certification. Exam structure, free resources, preparation time and tips from certified experts.
Data Engineer vs Data Analyst: What Are the Differences in 2025?
Understanding the differences between Data Engineer and Data Analyst: missions, skills, salaries and career progression. Guide to choosing the data career that suits you.
How to Optimize Your Power BI Report Performance with DAX
Discover best practices to improve your Power BI report performance through DAX measure optimization and data model tuning.
The 10 Most Common DAX Mistakes to Avoid in Power BI
Discover the 10 DAX mistakes that 90% of Power BI users make and how to fix them. Practical guide with code examples to improve your measures.